Hello SOSfix, just to let you know the oled 65b7p-u is working and looking great. I jumped the 3.5 volts to the drive circut on the power supply. I did get my 24 volts for the t-con. Then like you said it was a main board issue. Thanks Much.
It's very important to be able to repair T-con because I've seen that some T-con boards have panel calibration data loaded at the factory, and it is not easy to recover that data. This applies only to OLED. LCD should still have exchangeable T-con.
thanks for your good teaching, i have 2 question, 1)wich type of alcohol you use on boards? 2)when you find a short capasitor, how do you know the voltage and capasity of that capasitor for chang to new one?
Rubbing alcohol 99% or any 95% and more will work, for SMD cap you can look for another cap same size and color in the same line, remove it then measure the capacitance in it, usually same capacitor size have same voltage
great video .. I took out the Tconn and tested and found a bunch of short capacitors. normally the capacitor can not be short for a functioning TV correct ? if capacitors from the tconn are shorted then this is most likely the reason why my TV keeps shutting down ? btw I checked both sides of the Tconn and on the other side just like you I found a few capacitors that are also shorted. I guess I will do your trip with the alcohol and inject some voltage to find the bad guy. btw did you replace the capacitor or left it out ?
Awesome! I just FOUND a OLED65B6P by the dumpster at a jobsite, screen is not cracked as I can see. No physical damage to the frame...can I get it to work? I will follow this thread and let you know! Did the power stay on with no display or did the power blink 3 times and go off?
Hi. Love your video. Would you please advise what are two device call, which you use to shows 1. tv power usage. 2. Temperature show on smartphones, looks like a device connect to your phone ? If you have brand name and model number would be great.
Hi, I have an OLED55B6V. I get a red standby light but when I turn the TV on the standby light flashes 3 times and i get no picture or sound, I don't even get a backlight. I have checked the power board and all voltages look good except the 24V to the T-CON board where I get 0. Am I right in thinking the power board needs replacing?
Per this tutorial I bought a new t-con board and the power continued to dip after turning on. I bought a main board changed it and now the tv turns on and power stays around 50 watts but there is no picture. Only a horizontal line on the screen when it turns on for a few seconds. Is there any hope for this tv or is it likely the panel? I have a power supply board on the way also.
@@SOSfixElectronics the power board voltages are good except 12vt_on on P201 that measures 3.5v, I noticed you skip this in your video, is that voltage normal?
Hello, thank you for helping us to repair our TVs ! I have the same problem on LG Oled 55EG9A7V. Tries to turn on and shut down instantly. I checked the voltages and there are good. fuses are OK When I unplug the video ribbon, It seems to hold power. I swaped Tcon board with on supposedly good and no succes. So I checked the capacitors on the main board and I found something strange : Next to the video ribbon plug, there are to capacitors that seems to be shorted but after 1 ou 2 seconds the multimeter stops beeping. How can I now the value of the caps and could it be some element next to it that makes me think it's faulty but not like any mosfet ? Thank you for your help.
@@matthieudequeker494 check the resistance, i think that caps are good, if you disconnect flex cables from tcon to screen and tv hold the power it may have a faulty screen common issues for the lg oled screen
@@SOSfixElectronics Thank you, I have to resolder the cap first. is there any way to find polarity ( if any ) on this type of cap ? Sorry I'm still learning and until now I've always been lucky and easy fixed powerboards :-) this time it is quite harder.
@@SOSfixElectronics Hello, I'm still struggling with my Oled TV. I have just reread what you said up here. I did not understood what you advised me at first. So I retried. In fact, TV doesn't hold power when I unplug the 4 ribons from Tcom to Screen. BUT, when I disconnect Tcon from motherboard It holds Power. ( Optical output shines and power led blinks 3 times and disappears ) As I said last time, I swapped tcon with same one from aliexpress. It would be very unlikely to get a Tcon with the same fault ? So don't you think the motherboard should be faulty ? Should I check the resistances on the motherboard next to the Tcon ribbon connector ? Thank you for every advise you should provide me.
What is the name of the board you were working on? I don’t have the tools to debug but have the same issue. If it’s cheaper I’d like to buy the board and swap it. Please let me know.
I have a 65EG9600-UA TV. The TV turns on fine but after some time it automatically switched off. I think when it gets hot it auto trips. Do you know what may be going on ? Appreciate your hellp
Hi, from Uruguay, I have the same TV 65b7 and exactly the same failure, I'm not expert, the service suggest me a replacement of tcon board, but seeing this video i could repair it, how probable is that my problem be the same capacitor that yours? Because I'm not a technician and only have a tester and solder. Thanks you.
@@luchosantilli trajeron la tcon del exterior y la cambiaron, se dieron cuenta que no era el problema, 50 días esperando esta noticia, ahora me dicen que es la mother, y tengo que esperar la misma cantidad de tiempo, voy casi 70 días sin TV. El service en Uruguay es Service IT
@@nicolasborgiani5399 increíble.. lo positivo es que la tv solo trae 3 placas, la tcon, la mother y la fuente… asi que solo tienen 2 opciones mas para hacerlo andar…
I’ve oled55c7 the red standby is on. When i turn tv on by remote or push on tv, the red light blink 3 times then off but have black screen. And i measure all output Voltages of Psu , only 24v not present. I did it again after disconnecting cable Psu to T-con, the result is the same, the only 24v not there. Do you mind the Psu have problem?? So I disconnected all cable from Psu to t-con and main board than measured voltages, i just found on pin 12v about 7.98v. How suppose to do to force Psu drive 24v without connecting Psu to mainboard and t-con while the Psu have only 7.98v on pin 12v?? Please advise Me. Thanks before.
Hi Sir, I 've the same tv, and the power relay is clicking when in standby. They ask me 600 euro to change the complete board but I was wondering if this is a known problem and if may just be a faulty relay. any experience on this issue? thanks!
Hi budd thank u for the tutorial My tv is reading the voltage on both the upper and lower clips The problem is tv can’t turn on Turns on three secs then turn off but I notice when I disconnected the lower clip the tv took a longer time to shut off do u know what would be the problem
Hi! My LG 55C8 oled tv has the main board damaged. I can't find this board for sale, but the 55C9 I can find. Physically the cards seem to be compatible. Do you know if I can use the C9 main board in the C8? I live in Brazil. Thank you!
Hello! I saw that the back sticker stated 120V only but once you opened it the power supply said 120/220V, that means it would work fine in a 220V country too and wouldn't explode right? Thank you!
you right power supply said 220v put sticker on tv said 110v, you cant tell if the components in that power supply support 220v. to be sure look on user manual specs, if you can take tv apart disconnect everything from power board before you plug it to 220v is better
I have an lg oled77cxpua that just clicks on and immediately off... I've tried replacing the tcon and main boards, but its still doin g the same thing. I thought it might be the panel, but when i leave the two ribbon cables disconnected, it still does the same thing. Any thoughts about what it could be?
My tv is doing this but when it turns off parts of the screen light up in green hue and then the tv shuts off just like the one in the video. It’s the same lg65b7a. Was this one showing slight green when you then the tv on then shutting off right after?
Have you fixed your TV? Mine is doing the same, however it's turning on after a few tries, but it's been getting worse. When the TV turns on everything is fine and the picture is perfect. No lines on the screen
hello, i have LG Oled 65 C9 tv, and i have the same problem as this in the video. I've ordered the power supply and the TCON none of them work and the only one that I've haven't gotten check is the motherboard do you think could be the problem. i need help.
Hello before I get to deep into this lg oled 65b7p-u. It was a free tv to start, the power supply was completely dead. Ordered one the tv still won't come on checked the voltages it's missing 24 volts from the power supply. Then the 19 volts from the main board fluctuates I'm still figuring the screen module took a crap. Any idea's would be appreciated.
back to 2020 the Mainboard went broken, this year i bought new and yesterday my new LVDS cable arrived and tv is booting perfectly with perfect screen. But after 10 Minutes TV went off, and i recorded it. i watched it in slow motion and saw that it went dark in the middle to both sides with lines. After turn on again, really fast flashing orange line appears. it's big. But if i wait some minutes and try again, tv works again for some minutes. If you wonder how this looks, i will upload videos to the tv in some days.
I have same TV … it comes on for a second then goes off with a vertical green strip from top to bottom of screen about 3/4 on the right side ,, any ideas what it is ??? Hate to throw a3000 $ t v in the trash ,,, i am thinking power suppy ???
Hi, i have a rare question, is possible to change a mainboard of the tv BX model with a main board of CX model, in ebay sells many boards and the internal connections are the same on the same position except for the back cover hdmi input not in same place but can be fixed with some holes
Hi, I am in quite the doozy and would like to get your expertise since you’ve worked with OLED. I have a XBR-77A1E with a burnt primary plug on the power supply board. What is burned is the EVDD_26V, 8 of them, and I don’t know what that means. I have gotten another board off eBay (the only board I found at all) and it came with the power relay ripped off. I want to be able to see what I can do with this TV to get it to working again, the new board doesn’t do anything and I’ve found that if I connect the cable that runs from the primary board to the DKA digital board that’s where things short and the TV doesn’t turn on. Could the cable be the issue as well? It looks totally fine, if those pins were burnt do you think that everything else is toast? The TV doesn’t turn on at all with everything plugged in so I’m assuming the panel is still fine. Thanks.
if the connector burned my not have a good connectivity, evdd-26v that is a 26volt out put plug, to the Drive, maybe something shorted in other boards causing the vdd26v to burned, you need the relay in power board to work and get a multimeter and check voltages
so what left is power board and the screen, check the voltages when the tv on power on mode, if all voltages up and running the problem in the screen (no way to fix the OLD screen yet)
Mayroon akong LG oled c9, kapag binuksan ko mayroon lamang isang patayong linya tulad ng sa iyong video, lumiliko ito at naka-off, naalis ko ang pagkakabit ng lcd at nananatili itong pareho, naalis ko ang t-con board na lumiliko ito sa normal, magkakaroon ba ng anumang pagkakataon na ito ay ang t board -con?
Hi, 24v is also missing in my case. When I disconnect one tape that goes from tcon to the motherboard, 24v works. The capacitors seem ok, at least they were 70 ohms, disconnecting the panel from tcon does not help. What could be wrong?
My OLED lg have an issue after turn off -it will not go to standby (led is off) it will have to be unplugged from elctric power for 2-3 minute and plug back then the standby led Wil be on and it possible to turn on, can it be one of capcitor on power board or the relay?
@@zsbalak some mosfet they may have one leg going to the ground, if it is one leg thats ok but if there is 2 or all shorted thats mean the mosfet is bad, check the voltages from power board to the tcon should be 12v and 24v. i did face some of this LGs with bad motherboard as well check that
@@SOSfixElectronics 3 the same with 2 legs. Only 1 shorted. But why... The psu depending on room temp give 11.9/23.4 to 13.5/25.7V usually more V's when it is colder RT's. Just ordered a T-Con board, but not sure the PSU works well. What need check on psu more as outgoing V's?
@@SOSfixElectronics hi and thx @SOSfix, @all for sharing. working through all these steps on my 55c7d i am not sure how to proceed. i also have an unchanged black screen after turning on the tv. the red standby led will change from steady to blinking 3 times and then the led stays off as if the tv would be on. turning off by remote or directly on the tv seems not to be working once it's switched on. compared to your case i don't need to turn the tv on over and over again. So I checked the power board voltages comfortably and they all occur to be fine. i kept following your steps on the fuses, the capacitors and coils with a similar outcome. like "formasters link above" i had no voltage on the same coil like him. the coil wich was giving you no voltage is located slightly upper left above the 5/2/3 rows of capacitors, right!? so it might not make sense to assume its the same capacitor rows like your case on the back of the board. i can't see any burns or similar. there is noise coming from the power board wich has always been there (sounds and cycles unchanged). there is little noise coming from the mainboard, probably from the main chip with the big silver cooler. took it off to be sure but can't exactly tell. i also believe i might have to face a faulty mainboard. the history of faults made me come to that conclusion. It started with a loss of the red cursor on the screen wich appeared when you we’re using the remote… it suddenly disappeared. then i recognized wlan to be switched off and not to be able to get it back on. i didn't care because i mainly use my chromecast and the game consoles. so the hdmi was all I needed. but then the tv occationally went off by it self (on 3 or 4 following days) until it stayed dark entirely. back to the lab... where would you keep looking?
I have an oled Tv moele is oled65b6p. it is not turning on. It staya black and gives 3 blinking light.. i have checked. there is 3 boards. power board, Tcon and mother board. there is 3 connectors. the one which goes from power board to mother is ok and gives me all the voltage but the one from power board to Tcon is 12 volte and 24volte. it has no power... what could be the problem????
Seems a general issue on LG TV, I bought a CX 2 weeks ago, and it was broken last week. Same issue, can’t turn on. Has asked a replacement from the store.
I have OLED 65CXPVA and just not working after 2weeks of its use. Image blinks and screen is not turning on. But sometimes it switch on and video disappear just after 5 seconds and screen becoming black. Where you think such faults originates? Pls Advise
I have this le650aqp-ama2-y31 tcon board in sony 65A9G and I get 4 blink error code. disconnecting LVDS cable from mainboard to tcon keeps the TV ON with no picture or backlight. could you help me what else i can check to bring the picture back to see if that led issue or screen issue ?
do you have led tester? try this unplug the tv, hold vol - and power button then plug back the t to the power keep holding the 2 buttons until you see the green light release everything if you see the screen logo thats mean all the boards are good and lcd panel is good too, check one my video about sony backlight issue how to bypass it may help
I have OLED tv I replaced all 3 components power supply t-con board and main board, still did not fix the issue, the tv screen is not turning on and the standby light is blinking 3 times and with remote the standby light turns on and off but no picture on screen. Please help if you have any idea that can solve the issue. Thank you!
you can force the power board to give the drive voltage 24 by jump the 3.5v to Drv-on pin and check to see if it is stable, if yes must be the problem is the mainboard or screen
I've got this tv and notice two very faint blueish parallel lines near the bottom half of the screen recently.They are only noticeable during certain lighting on the screen. Is that a power issue or does it just need a reset?
Hello i have same model i changed t con and motherboard now tv display for 3 seconds and shut down , i checked power board have all voltage fine but drops when tv turn off i dont know what is the issue
Hello, please I need your help, I have an Oled TV as well 55EC930T, power light comes on but no display, and it makes 2 clicking sound when you turn it on
Hi ive a 65B6V and sometimes it turns on ok. But sometimes it comes on and goes off. Then you have to leave it for a week or so then its ok again for a while then does the same again. Screen is perfect when on. Is that a tconn psu or mainboard
Friend, I have issue with Sony Oled TV XR-77A80J , I will power on TV .. and TV turns on you can see the main menu for about 30-40 seconds and then it will shutdown blinking red lights 4 times. after I took unit off and started to unplug connectors and re-seating them. the TV somehow is staying on it has been over 10 mins. and I can turn TV on and off with remote no problem. so I test it by leaving TV on the main screen and I check it after 20 minutes unit shut down like power button was pressed. no blinking lights now. any idea issue ? would you by chance can point me to the correct direction to check on components ? I hope you can assist in troubleshooting.. Thank you friend.
@@SOSfixElectronics Actuslly fixed this why in the world… i disconnect all connections inside and reconnected them back and now TV boots up without issues ? LoL
I have very importand cuestion, I have broken Oled tv, and I cant find out what board is brocen. I know that power board is working great, steady voltage. But Main board don't want to start. Do is possible that main board will work without TCON board? Or Tcon Board is necessary , that main board will start? Because i have now hard time to check on what board is that fail. If main board can work without Tcon board conected, then I will know that main board have problem. my tv is lc550lud-lgp1-831 tcon is 6870c-05557A Please help!
hi I have just come across this video by looking for similar problems with my Oled tv ive replaced the psu thinking that was the issue and I am about to do the same with the mainboard, the only difference was when it was working the apps would load and then the display went all garbled same as connected devices to the HDMi slots. could this also be a tcon issue ?? mine is the LG 55EG960V thanks Jason
@@SOSfixElectronics hi thanks for the reply sorry mine is a slow one I sourced a replacement T-Con board that’s guaranteed working. And I still get the flashing power light. I have replaced both power boards as well. The only other thing is the main but I’ve nowhere to begin on that side of it. Is there a way to force power on ? And maybe get colour bars or something ?
@@jr20089v2x2xdisconnect mainboard from power board and tcone try to jump ps-on and drive on on power supply. If everythings ok yoi should get colors pattern
Hi, I got the same TV, sometimes (especially when it's cold) the tv won't start and shows faded moving green "lines" for 3 seconds after turning the tv on and then it just goes off, the led stays red and doesn't blink. Everytime I try to start the tv the spot where the green lines appear gets bigger. However after a few tries or when it's warm, the TV turns on normal and it show's a good picture with no lines or anything. the power supply is pretty loud too, everytime i turn it on it clicks and when it goes off it clicks, sometimes it clicks again after 10 minutes when it's in standby and then the tv works great again. I think it isn't a panel fault? And I don't know if the "clicking" is normal or an Indicator that something is bad with the power supply.
update: I found the problem, it‘s the t-con board like in your video. If it‘s disconnected the tv stays on, if I just disconnect the connection from tcon to panel the tv has the same problem. even with panel disconnected. T-Con looks like it has a burnt mosfet, but I need to confirm and check with multimeter
I have an oled55b6p with 3 blinking stand by lights and won't turn on. The red light in the optic port stays on,no picture or sound. All voltage looks normal accept I don't have the voltage from the power supply to the t-con. Any idea what board it could be? Much appreciated.
Hello, I have an OLED55B6V with an identical problem but in my case I have to disconnect the two flat cables in the middle that go from the t-con to the panel. With them turned on, the TV won't turn on, but with them turned off, it will turn on but I don't have a picture. Will the problem be in the t-con or the panel?
@@SOSfixElectronics But when I disconnect the flex cables from the middle of the T-con the TV stays on and has sound. The VGH VGL VCC voltage i dont know where to check on the PSU because they are not marked
Hello, My LG OLED55C7V has stopped working after update. Yesterday it asked me to update WebOS to with latest firmware update and I press ok. System start updating process and a few mintes later turned off TV and never start ((( what was wrong? Why it is not working? Can you help me?
Hi i have lg c9 65 inch oled kid threw a toy at the tv at the bottom near the standby light now the tv comes on and shows a big line down the screen and then turns itself off any help would be appreciated thanks
@@SOSfixElectronics ok but should it turn off i was thinkin of paying lg for a new panel cos the tv cost me 3 grand and the panel is abt 1 grand i dont wana buy a whole new tv or even buy the panel in case ther is other problems with the tv shouldnt it come on and work cos where it was hit is so small like rhe size of a penmy i seen worse damage on other peoples tv and they still come on
@@D0SAGE depends the damage in the screen, some defective screens may shows some colors before it dead completely .replacing the screen it is always a good option if it is not expansive
@@SOSfixElectronics yes he threw a toy at the screen the screen comes on with vertical lines but the picture is all black except for the vertical limes that show up but then immidiatly after the the tv turns on it turns off back to standby and thanks for replying my other youtube account btw lol
Hi, it there a way to replace mainboard and change some chips to adapt the resolution. I have one 32 " tv with standby issues and the tv wont turn on. i must try 100 times to power on and one time working. I ordered the same mainboard EAX66085703 model but from wrong tv 42" . The new motherboard working good but i have distorted and overlapped picture. I changed the tv size but there is again distorted picture on the display. I will try to change some chips on the new mainboard to make it working with my 40 inch tv. Do you know wich chip is for the setting and the resolution on the mainboard. my TV is LG 40UB800V and new Mainboard I ordered is 49UB8300-CG , 55UB8300-CG Model EAX66085703 the same mainboard as mine in the 40UB800V Thanks.
Hello I recently came across a lg OLED55B9PUA and I having the issue where it turns on for 5 secs, the screen looks normal for the first 2 secs, then starts flickering and then shuts off and res stand by light blinks 3 times I took of the cover and tested the prongs and it supposed to be 22vd it reads 28-30volts and where it supposed to be 12vt in reads 15-17volts. help please !!!
@@SOSfixElectronics Hello again friend👍 Yes - it is the same model 👍. I have 2 of them, and they turn off after a few seconds. If I take out the cable that control half of the picture, then the tv stays on. That is why I was thinking, that the Backlight needed to be change. But you mean, that there is no Backlight in that LG model? Best/ Mads - from Denmark
Hola tengo un tv LG Oled65A1PSA que se me quebró el panel en un extremo el tv se esta protegiendo y la fuente desconecta el voltaje que va a la tcom los 5 volts y los 12 volts si desconecto la entrada de los 12 volts el tv enciende sin imagen ,entonces sabes tu algún modo de poder obligar a la main para que me encienda el panel para poder ver el daño que tiene el panel a lo mejor se pueda rescatar y no importa que en el costado no tenga imagen ya revise las conecciones del panel donde se alimenta con 5 volts y 12volts y no hay corte alguno ,si en el primer flex del lado izquierdo al medir las pista marca extraño comparado con el flex del extremo derecho que son iguales es la única diferencia anómala que le veo espero respuesta y me puedas orientar soy técnico y entrego servicios pero es el primer tv oled que tengo en taller lo compre malo y quería ver la posibilidad de hacer ver algo de imagen para poder experimentar con este tv saludos desde Antofagasta Chile
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That was some incredible trouble shooting! 50 cent capacitor disable $3000 tv. Good job!
1cent
Hello SOSfix, just to let you know the oled 65b7p-u is working and looking great. I jumped the 3.5 volts to the drive circut on the power supply. I did get my 24 volts for the t-con. Then like you said it was a main board issue. Thanks Much.
I'll be spending some quality time with the one I picked up from the marketplace tomorrow and this video was an awesome video to know where to look at
I’m ur subscriber n newbie technician
Ur video great helpful, thanks
WOW, we need you in Germany to Repair Electronics.
Hi! This is a great video! I have a similar tv (very close) and the diagnostic is diferent... Red light is always on and "blinks black" when click ON.
Hello! Could I by chance contact you directly with a few diagnosis questions for our TV? Your videos are very helpful… the best I’ve found! :)
you are genius man thank u for shearing this video
It's very important to be able to repair T-con because I've seen that some T-con boards have panel calibration data loaded at the factory, and it is not easy to recover that data. This applies only to OLED. LCD should still have exchangeable T-con.
thanks for your good teaching, i have 2 question, 1)wich type of alcohol you use on boards? 2)when you find a short capasitor, how do you know the voltage and capasity of that capasitor for chang to new one?
Rubbing alcohol 99% or any 95% and more will work, for SMD cap you can look for another cap same size and color in the same line, remove it then measure the capacitance in it, usually same capacitor size have same voltage
great video .. I took out the Tconn and tested and found a bunch of short capacitors. normally the capacitor can not be short for a functioning TV correct ? if capacitors from the tconn are shorted then this is most likely the reason why my TV keeps shutting down ? btw I checked both sides of the Tconn and on the other side just like you I found a few capacitors that are also shorted. I guess I will do your trip with the alcohol and inject some voltage to find the bad guy. btw did you replace the capacitor or left it out ?
Good luck sir 🎉
thank you bro
So replacing the TCon board(the board you replace the capacitor) would had fix issues as well?
Thank you, very informative
Nice video and Good job, it was very interesting. Thank you ////////////////////
Awesome! I just FOUND a OLED65B6P by the dumpster at a jobsite, screen is not cracked as I can see. No physical damage to the frame...can I get it to work? I will follow this thread and let you know! Did the power stay on with no display or did the power blink 3 times and go off?
test your tv first and get the notes, take the back cover and test the voltages as shows in the video
Hi. Love your video. Would you please advise what are two device call, which you use to shows 1. tv power usage. 2. Temperature show on smartphones, looks like a device connect to your phone ?
If you have brand name and model number would be great.
watt meter. and flir one pro lt
Great job !! Are you using your Flir one pro ?
Спасибо дружище 😊
Hi, I have an OLED55B6V. I get a red standby light but when I turn the TV on the standby light flashes 3 times and i get no picture or sound, I don't even get a backlight. I have checked the power board and all voltages look good except the 24V to the T-CON board where I get 0. Am I right in thinking the power board needs replacing?
Have the exact problem on my B7V, did you happen to resolve the issue?
Hey 👍. Did you find a solution?
Per this tutorial I bought a new t-con board and the power continued to dip after turning on. I bought a main board changed it and now the tv turns on and power stays around 50 watts but there is no picture. Only a horizontal line on the screen when it turns on for a few seconds. Is there any hope for this tv or is it likely the panel? I have a power supply board on the way also.
did you check all voltages ?
@@SOSfixElectronics the power board voltages are good except 12vt_on on P201 that measures 3.5v, I noticed you skip this in your video, is that voltage normal?
@@thepiecesfit5049 3.5 v is good that voltage is from the main board to turns on the 12v fom power board to tcon
Hello,
thank you for helping us to repair our TVs ! I have the same problem on LG Oled 55EG9A7V.
Tries to turn on and shut down instantly. I checked the voltages and there are good. fuses are OK
When I unplug the video ribbon, It seems to hold power. I swaped Tcon board with on supposedly good and no succes.
So I checked the capacitors on the main board and I found something strange : Next to the video ribbon plug, there are to capacitors that seems to be shorted but after 1 ou 2 seconds the multimeter stops beeping.
How can I now the value of the caps and could it be some element next to it that makes me think it's faulty but not like any mosfet ?
Thank you for your help.
Just removed supposed faulty cap : no success. When testing this cap, multimeter beeps once.
@@matthieudequeker494 check the resistance, i think that caps are good, if you disconnect flex cables from tcon to screen and tv hold the power it may have a faulty screen common issues for the lg oled screen
@@SOSfixElectronics Thank you, I have to resolder the cap first. is there any way to find polarity ( if any ) on this type of cap ?
Sorry I'm still learning and until now I've always been lucky and easy fixed powerboards :-) this time it is quite harder.
@@matthieudequeker494 the brown orange smd caps that has no mark on them there is no polarity. it will work both ways.
@@SOSfixElectronics Hello, I'm still struggling with my Oled TV. I have just reread what you said up here. I did not understood what you advised me at first. So I retried.
In fact, TV doesn't hold power when I unplug the 4 ribons from Tcom to Screen.
BUT, when I disconnect Tcon from motherboard It holds Power. ( Optical output shines and power led blinks 3 times and disappears )
As I said last time, I swapped tcon with same one from aliexpress. It would be very unlikely to get a Tcon with the same fault ? So don't you think the motherboard should be faulty ?
Should I check the resistances on the motherboard next to the Tcon ribbon connector ?
Thank you for every advise you should provide me.
What is the name of the board you were working on? I don’t have the tools to debug but have the same issue. If it’s cheaper I’d like to buy the board and swap it. Please let me know.
tcon board
@@SOSfixElectronics Thank you $40 USD that is cheap! all things considering
Thanks most emportant
new subscribe and im newbie technician
I have a 65EG9600-UA TV. The TV turns on fine but after some time it automatically switched off. I think when it gets hot it auto trips. Do you know what may be going on ? Appreciate your hellp
take it apart and check the boards start with voltages, you may flip the boards and check solder joint too
Hi, from Uruguay, I have the same TV 65b7 and exactly the same failure, I'm not expert, the service suggest me a replacement of tcon board, but seeing this video i could repair it, how probable is that my problem be the same capacitor that yours? Because I'm not a technician and only have a tester and solder. Thanks you.
you need a multimeter to check for short
y? te lo arreglaron o le tuviste que cambiar la tcon?
@@luchosantilli trajeron la tcon del exterior y la cambiaron, se dieron cuenta que no era el problema, 50 días esperando esta noticia, ahora me dicen que es la mother, y tengo que esperar la misma cantidad de tiempo, voy casi 70 días sin TV. El service en Uruguay es Service IT
@@nicolasborgiani5399 increíble.. lo positivo es que la tv solo trae 3 placas, la tcon, la mother y la fuente… asi que solo tienen 2 opciones mas para hacerlo andar…
I’ve oled55c7 the red standby is on. When i turn tv on by remote or push on tv, the red light blink 3 times then off but have black screen. And i measure all output Voltages of Psu , only 24v not present.
I did it again after disconnecting cable Psu to T-con, the result is the same, the only 24v not there. Do you mind the Psu have problem??
So I disconnected all cable from Psu to t-con and main board than measured voltages, i just found on pin 12v about 7.98v.
How suppose to do to force Psu drive 24v without connecting Psu to mainboard and t-con while the Psu have only 7.98v on pin 12v?? Please advise Me. Thanks before.
Hi Sir, I 've the same tv, and the power relay is clicking when in standby. They ask me 600 euro to change the complete board but I was wondering if this is a known problem and if may just be a faulty relay. any experience on this issue? thanks!
Hi budd thank u for the tutorial
My tv is reading the voltage on both the upper and lower clips
The problem is tv can’t turn on
Turns on three secs then turn off but I notice when I disconnected the lower clip the tv took a longer time to shut off do u know what would be the problem
the voltages are good? mainboard sending P-on voltage?
Thank you very much
I saw your work shop,its nice and where can i find the fuse checking prob and what is its name?
you mean the multimeter?
Hi! My LG 55C8 oled tv has the main board damaged. I can't find this board for sale, but the 55C9 I can find. Physically the cards seem to be compatible. Do you know if I can use the C9 main board in the C8? I live in Brazil. Thank you!
yes it should work. if the mainboard is the issue
Grate fix
Thank you
Hello! I saw that the back sticker stated 120V only but once you opened it the power supply said 120/220V, that means it would work fine in a 220V country too and wouldn't explode right? Thank you!
you right power supply said 220v put sticker on tv said 110v, you cant tell if the components in that power supply support 220v. to be sure look on user manual specs, if you can take tv apart disconnect everything from power board before you plug it to 220v is better
I have an lg oled77cxpua that just clicks on and immediately off... I've tried replacing the tcon and main boards, but its still doin g the same thing. I thought it might be the panel, but when i leave the two ribbon cables disconnected, it still does the same thing. Any thoughts about what it could be?
LG B9 65” 4 years old, shot sparks out of the back while it was on and turned off.
My tv is doing this but when it turns off parts of the screen light up in green hue and then the tv shuts off just like the one in the video. It’s the same lg65b7a. Was this one showing slight green when you then the tv on then shutting off right after?
the customer told me it showed some colors before it completely death
Have you fixed your TV? Mine is doing the same, however it's turning on after a few tries, but it's been getting worse. When the TV turns on everything is fine and the picture is perfect. No lines on the screen
hello, i have LG Oled 65 C9 tv, and i have the same problem as this in the video. I've ordered the power supply and the TCON none of them work and the only one that I've haven't gotten check is the motherboard do you think could be the problem. i need help.
Hello before I get to deep into this lg oled 65b7p-u. It was a free tv to start, the power supply was completely dead. Ordered one the tv still won't come on checked the voltages it's missing 24 volts from the power supply. Then the 19 volts from the main board fluctuates I'm still figuring the screen module took a crap. Any idea's would be appreciated.
if you have 3.5 on Powerboard and no red light on tv check the mainboard
Thanks for this video. Please have you come across this LG 55EC930V TV with on and off LG logo standby?
no, but use the same way to check voltages on the 3 boards
I repaired this TV *almost*
back to 2020 the Mainboard went broken, this year i bought new and yesterday my new LVDS cable arrived and tv is booting perfectly with perfect screen. But after 10 Minutes TV went off, and i recorded it. i watched it in slow motion and saw that it went dark in the middle to both sides with lines.
After turn on again, really fast flashing orange line appears. it's big. But if i wait some minutes and try again, tv works again for some minutes.
If you wonder how this looks, i will upload videos to the tv in some days.
I have same TV … it comes on for a second then goes off with a vertical green strip from top to bottom of screen about 3/4 on the right side ,, any ideas what it is ??? Hate to throw a3000 $ t v in the trash ,,, i am thinking power suppy ???
looks like bad screen
Hi, i have a rare question, is possible to change a mainboard of the tv BX model with a main board of CX model, in ebay sells many boards and the internal connections are the same on the same position except for the back cover hdmi input not in same place but can be fixed with some holes
yes if they have same connectors, for lg it should works, be sure the problem is not in the screen
Can i use a c9 parts to upgrade a c8 55"? Lgoled
Tack!
good job en thanks for this share
Great video
Hi, I am in quite the doozy and would like to get your expertise since you’ve worked with OLED. I have a XBR-77A1E with a burnt primary plug on the power supply board. What is burned is the EVDD_26V, 8 of them, and I don’t know what that means. I have gotten another board off eBay (the only board I found at all) and it came with the power relay ripped off. I want to be able to see what I can do with this TV to get it to working again, the new board doesn’t do anything and I’ve found that if I connect the cable that runs from the primary board to the DKA digital board that’s where things short and the TV doesn’t turn on. Could the cable be the issue as well? It looks totally fine, if those pins were burnt do you think that everything else is toast? The TV doesn’t turn on at all with everything plugged in so I’m assuming the panel is still fine. Thanks.
if the connector burned my not have a good connectivity, evdd-26v that is a 26volt out put plug, to the Drive, maybe something shorted in other boards causing the vdd26v to burned, you need the relay in power board to work and get a multimeter and check voltages
@@SOSfixElectronics I have resoldered a loose capacitor on the t-con, still issue w image display, will replace t-conn to test if screen is functional
I have a oled55e6p-u September 2016 replaced main board and t -con board TV turn's on and about 15 seconds shots off help please what do I do?
so what left is power board and the screen, check the voltages when the tv on power on mode, if all voltages up and running the problem in the screen (no way to fix the OLD screen yet)
Mayroon akong LG oled c9, kapag binuksan ko mayroon lamang isang patayong linya tulad ng sa iyong video, lumiliko ito at naka-off, naalis ko ang pagkakabit ng lcd at nananatili itong pareho, naalis ko ang t-con board na lumiliko ito sa normal, magkakaroon ba ng anumang pagkakataon na ito ay ang t board -con?
Hi, 24v is also missing in my case. When I disconnect one tape that goes from tcon to the motherboard, 24v works. The capacitors seem ok, at least they were 70 ohms, disconnecting the panel from tcon does not help. What could be wrong?
My OLED lg have an issue after turn off -it will not go to standby (led is off) it will have to be unplugged from elctric power for 2-3 minute and plug back then the standby led Wil be on and it possible to turn on, can it be one of capcitor on power board or the relay?
Good job
Hi, On B6 there is a short on the same coil and 1 mosfet. Other Voltages ok, no smd short, get sound but no picture, have u any idea please?
coil usually not short to the ground should be other component that causing the short look for that
@@SOSfixElectronics thx 4 fast rep, here is one mosfet also shorted. pasteboard.co/KayKA9z.jpg
@@zsbalak some mosfet they may have one leg going to the ground, if it is one leg thats ok but if there is 2 or all shorted thats mean the mosfet is bad, check the voltages from power board to the tcon should be 12v and 24v. i did face some of this LGs with bad motherboard as well check that
@@SOSfixElectronics 3 the same with 2 legs. Only 1 shorted. But why... The psu depending on room temp give 11.9/23.4 to 13.5/25.7V usually more V's when it is colder RT's. Just ordered a T-Con board, but not sure the PSU works well. What need check on psu more as outgoing V's?
@@SOSfixElectronics
hi and thx @SOSfix, @all for sharing.
working through all these steps on my 55c7d i am not sure how to proceed.
i also have an unchanged black screen after turning on the tv. the red standby led will change from steady to blinking 3 times and then the led stays off as if the tv would be on. turning off by remote or directly on the tv seems not to be working once it's switched on.
compared to your case i don't need to turn the tv on over and over again. So I checked the power board voltages comfortably and they all occur to be fine. i kept following your steps on the fuses, the capacitors and coils with a similar outcome.
like "formasters link above" i had no voltage on the same coil like him. the coil wich was giving you no voltage is located slightly upper left above the 5/2/3 rows of capacitors, right!? so it might not make sense to assume its the same capacitor rows like your case on the back of the board. i can't see any burns or similar. there is noise coming from the power board wich has always been there (sounds and cycles unchanged). there is little noise coming from the mainboard, probably from the main chip with the big silver cooler. took it off to be sure but can't exactly tell.
i also believe i might have to face a faulty mainboard. the history of faults made me come to that conclusion. It started with a loss of the red cursor on the screen wich appeared when you we’re using the remote… it suddenly disappeared.
then i recognized wlan to be switched off and not to be able to get it back on.
i didn't care because i mainly use my chromecast and the game consoles. so the hdmi was all I needed.
but then the tv occationally went off by it self (on 3 or 4 following days) until it stayed dark entirely.
back to the lab... where would you keep looking?
I have an oled Tv moele is oled65b6p. it is not turning on. It staya black and gives 3 blinking light.. i have checked. there is 3 boards. power board, Tcon and mother board. there is 3 connectors. the one which goes from power board to mother is ok and gives me all the voltage but the one from power board to Tcon is 12 volte and 24volte. it has no power... what could be the problem????
Seems a general issue on LG TV, I bought a CX 2 weeks ago, and it was broken last week. Same issue, can’t turn on. Has asked a replacement from the store.
Where are the
I have LG oled 65 curve and it is at standby mode and the light is blinking and can’t switch on
Super 👍
Thank you 👍
I have OLED 65CXPVA and just not working after 2weeks of its use. Image blinks and screen is not turning on. But sometimes it switch on and video disappear just after 5 seconds and screen becoming black. Where you think such faults originates? Pls Advise
Niceee job !!!
I have this le650aqp-ama2-y31 tcon board in sony 65A9G and I get 4 blink error code. disconnecting LVDS cable from mainboard to tcon keeps the TV ON with no picture or backlight. could you help me what else i can check to bring the picture back to see if that led issue or screen issue ?
do you have led tester? try this unplug the tv, hold vol - and power button then plug back the t to the power keep holding the 2 buttons until you see the green light release everything if you see the screen logo thats mean all the boards are good and lcd panel is good too, check one my video about sony backlight issue how to bypass it may help
@JD Scott maybe you have shorted traces inside the panel, try to cover some pins in the flex cable
@JD Scott yes you can i have videos how to do that
Hi, do you have schematic for power supply? Need to know values of LF101 and LF102 coils, many thanks.
I have OLED tv I replaced all 3 components power supply t-con board and main board, still did not fix the issue, the tv screen is not turning on and the standby light is blinking 3 times and with remote the standby light turns on and off but no picture on screen. Please help if you have any idea that can solve the issue. Thank you!
my all voltages are Good BUT I can’t find any Volts on P202 on the 24VD Points .. will appreciate your Help
you can force the power board to give the drive voltage 24 by jump the 3.5v to Drv-on pin and check to see if it is stable, if yes must be the problem is the mainboard or screen
I've got this tv and notice two very faint blueish parallel lines near the bottom half of the screen recently.They are only noticeable during certain lighting on the screen. Is that a power issue or does it just need a reset?
What’s the model of thermal camera?
flir one pro lt
Hello i have same model i changed t con and motherboard now tv display for 3 seconds and shut down , i checked power board have all voltage fine but drops when tv turn off i dont know what is the issue
Hello, please I need your help, I have an Oled TV as well 55EC930T, power light comes on but no display, and it makes 2 clicking sound when you turn it on
Hi ive a 65B6V and sometimes it turns on ok. But sometimes it comes on and goes off. Then you have to leave it for a week or so then its ok again for a while then does the same again. Screen is perfect when on. Is that a tconn psu or mainboard
More likely main board than anything else with that fault, but hard to determine for sure without specifically testing things.
Friend, I have issue with Sony Oled TV XR-77A80J , I will power on TV .. and TV turns on you can see the main menu for about 30-40 seconds and then it will shutdown blinking red lights 4 times. after I took unit off and started to unplug connectors and re-seating them. the TV somehow is staying on it has been over 10 mins. and I can turn TV on and off with remote no problem. so I test it by leaving TV on the main screen and I check it after 20 minutes unit shut down like power button was pressed. no blinking lights now. any idea issue ? would you by chance can point me to the correct direction to check on components ? I hope you can assist in troubleshooting.. Thank you friend.
is hard to tell, just get the multimeter and start with power board voltages
@@SOSfixElectronics Actuslly fixed this why in the world… i disconnect all connections inside and reconnected them back and now TV boots up without issues ? LoL
I have very importand cuestion, I have broken Oled tv, and I cant find out what board is brocen. I know that power board is working great, steady voltage. But Main board don't want to start. Do is possible that main board will work without TCON board? Or Tcon Board is necessary , that main board will start? Because i have now hard time to check on what board is that fail. If main board can work without Tcon board conected, then I will know that main board have problem.
my tv is lc550lud-lgp1-831 tcon is 6870c-05557A Please help!
hi I have just come across this video by looking for similar problems with my Oled tv
ive replaced the psu thinking that was the issue and I am about to do the same with the mainboard,
the only difference was when it was working the apps would load and then the display went all garbled same as connected devices to the HDMi slots.
could this also be a tcon issue ??
mine is the LG 55EG960V
thanks
Jason
Hard to tell. Check the voltages on tcon. Must have 12v and 24v on drive. And 3.3v 1.8 ram 1.2 processor vgh 26v vgl -7v vcc 12v check on coils
@@SOSfixElectronics hi thanks for the reply sorry mine is a slow one
I sourced a replacement T-Con board that’s guaranteed working.
And I still get the flashing power light.
I have replaced both power boards as well.
The only other thing is the main but I’ve nowhere to begin on that side of it.
Is there a way to force power on ? And maybe get colour bars or something ?
@@jr20089v2x2xdisconnect mainboard from power board and tcone try to jump ps-on and drive on on power supply. If everythings ok yoi should get colors pattern
@@SOSfixElectronics
Thanks for the reply should I jump ps-on and drv-on together ?
@@jr20089v2x2x jump both to 5v or 3.5 STB
Hi, I got the same TV, sometimes (especially when it's cold) the tv won't start and shows faded moving green "lines" for 3 seconds after turning the tv on and then it just goes off, the led stays red and doesn't blink. Everytime I try to start the tv the spot where the green lines appear gets bigger. However after a few tries or when it's warm, the TV turns on normal and it show's a good picture with no lines or anything. the power supply is pretty loud too, everytime i turn it on it clicks and when it goes off it clicks, sometimes it clicks again after 10 minutes when it's in standby and then the tv works great again. I think it isn't a panel fault? And I don't know if the "clicking" is normal or an Indicator that something is bad with the power supply.
update: I found the problem, it‘s the t-con board like in your video. If it‘s disconnected the tv stays on, if I just disconnect the connection from tcon to panel the tv has the same problem. even with panel disconnected. T-Con looks like it has a burnt mosfet, but I need to confirm and check with multimeter
Please sir I have similar but is 55eg9a7v please how can I fix it? I really need your help
i dunno, you need to get a multimeter and start checking voltages, watch more videos to know how.
@@SOSfixElectronics sir can I get a video on how to fix this particular model?
@@SOSfixElectronics ok sir can I have your WhatsApp number?
@@anayosunday2676 sorry. But Just write the comments here and will try to help as i can
I have an oled55b6p with 3 blinking stand by lights and won't turn on. The red light in the optic port stays on,no picture or sound. All voltage looks normal accept I don't have the voltage from the power supply to the t-con. Any idea what board it could be? Much appreciated.
@Mike Dizzle Same to my have only audio?
Check diode 18 have short if have connected the 2 external flat display cable panel. The panel have 4 cable
hi i have a lg oled g8pla it just blinks and doesn't want to turn on can you help me thank you
check tcon voltages first
sir what tools use for lie with secure the oled tv ?
Hello, I have an OLED55B6V with an identical problem but in my case I have to disconnect the two flat cables in the middle that go from the t-con to the panel. With them turned on, the TV won't turn on, but with them turned off, it will turn on but I don't have a picture. Will the problem be in the t-con or the panel?
hello, check the tcon voltages before and after you disconnect each flex cable and turns on the tv
@@SOSfixElectronics I have 12 volts and 24 volts with both connected and disconnected flex cables
@@mustangbolt67 other voltages as VGH VGL VCC
@@SOSfixElectronics But when I disconnect the flex cables from the middle of the T-con the TV stays on and has sound. The VGH VGL VCC voltage i dont know where to check on the PSU because they are not marked
@@mustangbolt67 vgh vgl vcc are the tcon voltages
Sir,to you have a picture of your thermal camera?
flir one pro LT
Hello,
My LG OLED55C7V has stopped working after update. Yesterday it asked me to update WebOS to with latest firmware update and I press ok. System start updating process and a few mintes later turned off TV and never start ((( what was wrong? Why it is not working? Can you help me?
crypted firmware. try hard reset, if not change the mainboard
Hi i have lg c9 65 inch oled kid threw a toy at the tv at the bottom near the standby light now the tv comes on and shows a big line down the screen and then turns itself off any help would be appreciated thanks
you got a small crack there and sorry there is no repair for that
@@SOSfixElectronics ok but should it turn off i was thinkin of paying lg for a new panel cos the tv cost me 3 grand and the panel is abt 1 grand i dont wana buy a whole new tv or even buy the panel in case ther is other problems with the tv shouldnt it come on and work cos where it was hit is so small like rhe size of a penmy i seen worse damage on other peoples tv and they still come on
@@D0SAGE depends the damage in the screen, some defective screens may shows some colors before it dead completely .replacing the screen it is always a good option if it is not expansive
@@SOSfixElectronics yes he threw a toy at the screen the screen comes on with vertical lines but the picture is all black except for the vertical limes that show up but then immidiatly after the the tv turns on it turns off back to standby and thanks for replying my other youtube account btw lol
Hi, I have a lag g8pla TV, it doesn't start, it flashes and it doesn't stay in stebay, can you help me please. the led flashes continuousl
disconnect the screen from tcon and see if the tv turns on stopped flashing, if yes you have a bad screen ( common issue)
Hi,
it there a way to replace mainboard and change some chips to adapt the resolution. I have one 32 " tv with standby issues and the tv wont turn on. i must try 100 times to power on and one time working. I ordered the same mainboard EAX66085703 model but from wrong tv 42" . The new motherboard working good but i have distorted and overlapped picture. I changed the tv size but there is again distorted picture on the display. I will try to change some chips on the new mainboard to make it working with my 40 inch tv. Do you know wich chip is for the setting and the resolution on the mainboard. my TV is LG 40UB800V and new Mainboard I ordered is 49UB8300-CG , 55UB8300-CG Model EAX66085703 the same mainboard as mine in the 40UB800V Thanks.
the tv resolution and settings stored in the eeprom
@@SOSfixElectronics Thanks, I changed the EEPROM and have the same issues.. any idea?
I have double the volts on all power supply outputs, why?
Hello I recently came across a lg OLED55B9PUA and I having the issue where it turns on for 5 secs, the screen looks normal for the first 2 secs, then starts flickering and then shuts off and res stand by light blinks 3 times I took of the cover and tested the prongs and it supposed to be 22vd it reads 28-30volts and where it supposed to be 12vt in reads 15-17volts. help please !!!
Could be the power suply is put out too much power and cause the tv to hit failsafe.
hard to tell needs to compare it with working tv, i dont have one at the moment
Hello friend
Do you know how to acces and change the Backlight?
Beat/ Mads, Denmark
are you talking about this lg? there no backlight in it, other brand i dunno
@@SOSfixElectronics Hello again friend👍
Yes - it is the same model 👍.
I have 2 of them, and they turn off after a few seconds. If I take out the cable that control half of the picture, then the tv stays on. That is why I was thinking, that the Backlight needed to be change.
But you mean, that there is no Backlight in that LG model?
Best/
Mads - from Denmark
I guess, that the Backlight is led edge lit
@@madsjuncker307 sir this is OLED TV 🤣
No backlight🤣sure 100%🤣
How can i purchase tcon board for my repair
ebay amazon shopjimmy
Is there any way that we can diagnose long distance on whatsapp
Bro tv mother ki lvds cable dono। Nikalne per tv on ho raha he
My TV has got same problem . It just shows a small flash at bottom right of screen and will not display anything.
My lg c2 is not turning on!! stand red light is off too
My tv won’t turn on only for three seconds then show a white and green vertical line
Do u know what’s the problem
sorry, sounds like a bad oled screen
Hola tengo un tv LG Oled65A1PSA que se me quebró el panel en un extremo el tv se esta protegiendo y la fuente desconecta el voltaje que va a la tcom los 5 volts y los 12 volts si desconecto la entrada de los 12 volts el tv enciende sin imagen ,entonces sabes tu algún modo de poder obligar a la main para que me encienda el panel para poder ver el daño que tiene el panel a lo mejor se pueda rescatar y no importa que en el costado no tenga imagen ya revise las conecciones del panel donde se alimenta con 5 volts y 12volts y no hay corte alguno ,si en el primer flex del lado izquierdo al medir las pista marca extraño comparado con el flex del extremo derecho que son iguales es la única diferencia anómala que le veo espero respuesta y me puedas orientar soy técnico y entrego servicios pero es el primer tv oled que tengo en taller lo compre malo y quería ver la posibilidad de hacer ver algo de imagen para poder experimentar con este tv saludos desde Antofagasta Chile
Its oled not qled
Please please help me fix my oled 55ec9300ua