Thanks so much for the video. By following your troubleshooting advice, I managed to fix our TV today. I found a main board for less than £5 on eBay, and that did the job perfectly. It's thanks to people like you that we can prevent (almost) perfectly working item from going into landfill. Please keep doing what you do.
I wish I had found this video last week. If I had known I could do that trick with turning the backlight on by unplugging the harness from the main board, I could have saved some money by not ordering the power board. Great video
Nicely made video and the voice is very good with no annoying background music. For a retired technician like myself, he really didn't say much other than just replace the board. Most likely there was a short on the bad board pulling one of the supply voltages down. However, I would have found which line was low when it was all connected up and then try and run the short down. Sometimes the shorted part will even get hot if left on for a short time and then you can go to it. There is always the possibility that if it was hit by lighting that there could be numerous problems with the bad board. Having said all of that, sometimes to save money and headaches just doing what he did on this video is the best way to go. Tring to repair a surface-mount board can at times be a headache.
Thank you for this, carried out your checks and found my Samsung tv has a faulty power board. Replaced with a secondhand one of the internet and back up and running👍🏼
your were great, just fix my un75ju6500fxza , was watching tv screen went green then black, but I still could hear sound. watching your video, gave me the wii to try, its working mainboard.. thank you
Thank you for your very helpful video I had a 2022 Samsung TV that would not power up. Found out the fuse on the power supply was blown. First I disconnected the main board, unsoldered fuse from the top of the board. Put in a temporary fuse and that blew immediately. Found a board on eBay for $40 and that's on the way.
Thank you. I was told that without the indicator light on the lower corner wasn't on then you have no power. So you need to get a power supply board to start with. I got ahold of your youtube instruction and found out it was the video board. Very helpful. Thanks again.
Thank you. Your videos are extremely helpful, informative and excellently put together. An extremely good service to those learning about tv repair and electronics in general. Atta Boy! Keep up the good work.
Really easy to follow troubleshooting guide. Thanks for sharing. Our tv that’s less than probably 5 years old has died. Bought at Costco but since everyone abused the return policy by upgrading their tvs every year, it’s way past the 90 day return window and probably past the extended as well. Power or logic could be the issue. Measuring the fuse and verifying voltage levels first was key. I’ll do the same.
I'm in the exact same situation.. got a philips 55pus 6401, died on me after lightning strikes . Of course it's just 3 months outta guarantee. . I've replaced the power board today, but still nothing. Replacement motherboard on the way,I'm hopeful it'll power up after seeing this vid, which is v informative, v useful, subscribed.
@@sirdon9304 all working now. got a donor TV, same model with broken screen dirt cheap- and took the parts out of that, direct swap with mine and it's all working fine now. Not sure how yours still isn't working, you got no standby light / ambilight/ Philips logo showing ?!
Thanks for the commentary on the power board testing. My UN55KS8500FXZA revision AA01 won't turn on and I tested the power and the cable. Going to this stage next. 👍
great video ,i have a two year old 75 inch Samsung that while i was watching ,i heard a pop and believe i saw a small sparking near where the power cord plugs in. my TV went black and will not turn back on with no lights anywhere. i haven't taking it apart yet but your video is giving me hope that I can fix it myself
Was about to give up on this same TV until I saw your video. Neat little tip about the backlights and checking voltage showed me that a few of my backlights were bad and must be shorted as they are impacting the outputs from the power supply. New backlights on order so I should be back in business when those arrive. Thanks for posting this video!
If a PCB is dropping the power supply voltage down to 0V, or, as in your case, causing the TV to seem to be turned off when plugged into the power supply, then there is probably a short. Replacing an SMT board is the most common solution to this problem, as you have shown. If you wanted to find exactly what component was shorting, pour 90% isopropyl alcohol over the board and, under low power of a stereo microscope, see where the alcohol dries up the fastest. The component on which the alcohol evaporates the fastest is the shorting component. Now, you can order a replacement board, substitute the shorting component from the board you ordered, and keep the board that you ordered, plus the board from the TV, as extra boards from which you can harvest replacement components for future TV and electronics repair jobs. Frank Frank Reiser Video/Audio Service
THANKS --- a few years ago ( maybe 3 ) I purchased a 56" Samsung TV which had been a DISPLAY model at a store ( probably had been on 24/7/365 until they reboxed it to sell it ) . Purchased it cheap -- It lasted until just a few months after the warrantee expired --- I was watching it and part of the screen started to go dark then the whole screen just went dark in about a minutes time. It has been siting in the other room for the last year now. After watching a few of these videos I think I might try and tackle trying to fix it. I have no idea what is wrong but I guess I can at least open it and see.
Nicely done video. It was really helpful to me, thank you! I thought my issue was the main board but was not. I found that the scotch tape method on the connectors worked for me. Nonetheless. Your trouble shooting steps in this video helped me tremendously to narrow down the root cause of the problem!
Sir, I've found your video to be the most useful and knowledgeable video among the hundreds I've watched. I am an electrician, but I'm not getting any readings from any of the pins from the power supply side. Also, when I unplugged the cable from power supply to the green board, no backlight came on. Would it be safe to assume the power supply/inverter is no good? Thank you in advance for any help, and the awesome straight to the point video you created for the rest of us 🤓
obviously it depends on your specific board and how its designed but yeah if there's no output then its probably the culprit. There will usually be at LEAST a constant 5v from one of the pins on all TV's. This allows it to go into a sleep mode but still keep an eye out for the power command from the remote or console power buttons.
Thanks - just went through this for my UE48HU7500ZXZT before ordering a new power board and yes, my power supply board is fine. So now to track down a mother board. Thanks!
I have the same TV and replaced the power board which solved my problem for a few weeks. Now I have no picture. Watching your video I have the same symptoms (no picture and lights go on when you unplug that cable). Looks like I'll order a new mainboard and hope that the T Con board is not bad also. Thank you.
Electronicle, thank you for your help. I tried the simple steps of unplugging the tv for a minute and replugging; didn't work. Then took the batteries out of the remote control, pressed the on button for 15 seconds, placed batteries back in the remote and pressed the on button, and it did not work either. Your video gives me more information as to what might be wrong. There was a storm a couple a days before it stopped working so probably that had to do with the malfunction. I will follow your instructions before I decide to get a new one. Thanks again.
Thanks a million for your amazing videos, it's been a long time since I last fixed one of these tvs but I remember you doing it before and I just need to say thanks again for such great work 😀 👍
Yessa.. same situation, worked great, storm hit. Hdmi ports stopped working. TV works periodically, sometimes the tv will turn on and off again without actually booting up no matter how long you leave it unplugged. Pretty sure since the hdmi ports are toast and it does power up sometimes it's almost gotta be the main board huh. Think I'll give it a shot. Thanks buddy.
Very informative video, good testing. I am currently checking my Samsung UN55J6200DAF bcuz a few days ago, as we watched Tv, we began to hear crackling at the rear of Tv and it went dim blue, then black. It turned off with remote, but I disconnected everything off the wall outlet as precaution, bcuz I also smelled burnt wire. Watching pertaining videos, I checked fuse, its good. I inspected all 3 boards and only at the power supply board did I see like melted wire plastic. I could not see anything unusual on the main green board, it has a red lit port. The T-con board seemed ok as well, it has blue lights when I power on. Odd thing is, she turns on with power button and remote, but will only turn off with remote. I tested all LEDs thru the corresponding wire leads and many did not light. I tested the port pins from where the LED connector goes, and it had No current going out. I did perform the test you did, unplugged cable connector from main or logic board and did get the four 12.65v results in those leads, plus the 4.50 power on voltage of other set. One thing is for certain, I am going to replace All the LED strips with new. And Im prepared to replace the power supply board as well. However, I am not sure about the green logic/main board. Waht say ye..? I'd appreciate any input. (incidentally, this Tv is 7yrs old, was working flawlessly).
Here was me thinking that I would have to get out a soldering iron, when all I have to do is have a spare power board and main board for every TV ever created :-)
shop jimmy has both of them for EVERY TV....used them years ago for another tv i found..........WAITING FOR A NEW MAINBOARD FOR A 43 INCH LED lg tv....works awesome minus both hdmi,s are shot......$35 here friday....30 minutes ..done...rather have hdmi to my pc...then to ethernet cable only....smart tv,s are not as smart vs hooked up to a pc....fact...
I have one of these that recently went bad, I've inspected the outer board and checked all the caps and diodes, I even removed some components to see if any were dead but they weren't. I didn't try the outer up with the cables removed though, I will try that later. It could be the same board I have problems with!
Thank you I will follow your instructions. I have the same problem with a LG screen 40 inch probably. Just curious what the problem is and if I can fix it. Good challenge
Yippee I fixed my tv. I have the parts and I swap them out one at a time and found it it was the main power source the first one that you tested to be the culprit. I put all the new parts in anyway and we'll save the ones that we're not the culprit for future use. I figured I had the TV open and I already had the parts I might as well switch them out. I'm so happy and it didn't cost me a penny. 12 years ago Best Buy was just supposed to fix my TV in the parts didn't show up on time so they brought parts then when the other parts arrived in the mail I just kept them for future use and I'm sure glad I did because now it's like I have a brand new TV. It's a 3D TV plasma so they don't make those anymore.
Good video. Have a 6900 series that a storm took out. On it all the boards are in one. All it has is backlights. I'm waiting on a replacement board to come in the mail and hoping it will fix it. 60bucks will be a lot better than $410 for a replacement.
Thank you for this video it really showed me a lot it seems like my TV has the same issue as the one you were fixing but now I'll check it to see if it's my main board or not
hehe i have my tv laying out here, with a similar problem, so was gladly following your instructions as a complete electro-novice. 1. Check power supply pins one by one. check, they're working, same as in the vid! 2. Get second hand mainboard supplied by owner... crap, dont' have that. Anyway thanks for sharing, the tip for unplugging the mainboard to see if the backlight was working was very nice to know!
I had the same issue and was able to spot some hairline cracks in some old solder connections. I just tapped both spots with my soldering gun and got it back up and running. Haven’t had any issues since. The cracks in the board were only visible on the back side of the board after unscrewing.
Great video. My samsung UE40EH5005K just died yesterday and I really can't afford a new one right now, basically not even used. No standby light, TV doesn't turn on. Took the power board off today and tried to check with my dad if something's wrong but we're no experts. I'm gonna try that backlight thing tomorrow to see if the power board is just dead. There is an area where the board is darker but visually to an untrained eye couldn't figure it out. Would be really nice to be able to fix it rather than buy a new tv.
Very helpful my televisions died all of a sudden and its 3yrs old I tried everything to get it to work. Now I see how easy it is to fix,I guess I'll just take it to a shop and have them fix it. Hope they dont over charge me!😥 Thanks for sharing.👍😊
My Samsung, that I purchased 9 years and 3 months ago, had the front red LED still flickering in response to the remote control device, but that was as far as it got. The screen and sound remained OFF, and the red LED would simply remain ON instead of turning OFF as the screen and sound come to life. So step one was to check all the PCB electrical connectors to be sure there is no oxidization. Once each of them were cleaned, I plugged them all back in, and bingo, my Samsung LN32C350D1DXZC TV was up and running again. That was about 2 years ago, and it is still running perfectly today. Long ago, I did also add a fan, to keep the TV much cooler, and thus keep the electrolytic caps much cooler as well. That one little old CPU fan made a huge temperature difference.
Your diagnose was good but you stopped to early. There is a mosfet on the board that you should have checked, it is for the power of the main chip that shorts. Just check for the legs to short and if it is shorted change it, you can get 10 of them for $5 and a lot of Tv's all use the same or very close.
I agree he should have kept going …..but perhaps he had spare boards on hand or the board was less expensive than his time to do component level troubleshooting. But certainly this video can help a lot of “ laymen” salvage their tv by showing that’s it’s not overwhelming or that you need to be a rocket scientist
Help Needed. I have a 65 inch Samsung SMart TV, It started Restarting and then few days later it stopped working totally. Now its not even turning on. No gave it to Service Center and they are saying the Panel of the tv needs to be replaced ! All backlights are fine, Power supply ok, Mother board is also ok. Is it right ? The panel is looking good (means no physical damage ever) Plz help...
Ive seen alot of these videos and in most cases its like get to the damn point. Your video wasn't like the rest which was koo... From my experiences and just having nothing better to do, if you grew up not having all the money in the world and things broke; for most that's how you learn to become a handy man. So for the people on here watching these type of videos and say "its because of these videos that gave you the push to jump in and trying to fix it yourself " i 👏 applaud you guys that's all it takes . To be honest 7 times out of 10 of all the tv's i fix here and there, its really only the Capacitor's and the ribbon cables that go bad and its really easy to fix those. As long as the lcd monitor or l.e.d's are not broken then usually what i just stated are usually the culprits.. If your an unlucky one it might be something a lil more but like i said if it isn't the screen or lights its easy to fix these things.. I got sick of seeing and hearing how people get ripped off for a fix that really was only a 5$ fix but getting charged about 100 then an additional 60 to "order" a part smh.. Good luck to all of you who are trying to roll on your own to fix your stuff don't get bamboozled by con artists.. Good video too!
Great video. Can you show video of how to repair/replace optical/audio socket on 2018 Samsung UN6900 smart tv? Worked until optical cable was pulled against when earphone adapter unit was pulled off of dresser and it hung down on the extended optical cable. I can feel that the optical/audio socket is loose. Can you show what parts or electrical board needs to be repaired/replaced? Thanks a lot.
Thanks for your imformative video but i thought the power board only gives the dc outputs when it gets a command from the main board so how did you measure those voltages?
It is easy to repair such a way by changing with the another ok board. If you look for the faulty which caused it you can be a good repair man!!! My little boy at the adged 12 can do it very easy!
Modern control boards are not easy to repair. Capacitors, diodes, resistors, etc are really tiny and difficult to desolder/solder. You’re better off replacing the whole unit.
Me too that’s what I spent 6-8 years training to do. 94-2002. Now it’s all smd so it’s to awkward to do. It’s all digital so the circuitry is completely different too. Used to love getting the circuit diagrams from reference library at college and in the village where I lived (about 1000 people) I was the man they turned to. I did it really cheap and sometimes only broke even but it was pocket money. Used to get help training at college. I still fix my own VCRs and CRT TVs but nobody else want ps anything doing. It’s the throw away society and the market is flooded with Chinese crap with no diagrams available.
Hi Thank you for your video extremely helpful I’ve got similar problem with my TV Samsung UE55F8000ST. I’m trying to find out which board I’m having a problem with. Is it the power board or the main board so I followed what you have done in video. I plugged it in And disconnected the cable from the power board connected to the main board it should have to trigger the back light to come on but I am getting the back lights come on and off on and off not constantly on so I am confused please help thanks
So it seems I have the same 2 board set and connector layout as in the vid. My power pins check out (12.8v) to include the 5v on/off power. However I did not get backlight when I disconnected the connector from the main board. So otherwise I would think the main board with that issue but still considering power board. Is that a must to have back light when determining if the power board is good or not?
My UN60JU7100F wont power on. I have two black cable sets coming out of power board. Removing blk set that goes to mother board from power board does not turn on back lights. Removing blk set that goes to Tcon board does light the back lights. Also removing the two whitish ribbon cables at bottom of Tcon board turns on the back lights. What do you think ? Thanks in advance.
I'm wondering if you have some advice. I have a 70 inch samsung 6 series TV. I'm not super familiar with new tv's (been a decade or so) I know how to replace boards and stuff. I've been trying to trouble shoot this. In this video you show how power goes through and mine does the same and is fine. I also have access to replacements and replaced both the power and main boards just in case. I'm still getting the same thing. Led blinks twice intermittent. in the back I can see the backlight come on full for a second or two, off then back on real fast to dim backlight for a second or so and then off. The flashing and the backlight go through this series over and over.
man I could really use your expertise on my 5 yr old Samsung 46" LED LCD $1,200 thin smart model tv, it was my favorite period. but niw it doesnt turn on any more 😞😞
@@mareknosek996 Sorry. its been so long ago I forgot. Just duckduckgo the part number and call everyone that shows that they may have it.It is a very very very hard part to find...
Thanks for the video that will help me fix my neighbours TV that went off after a power surge or lightning strike. Would be nice to know what component that failed.
Thanks for the video. Found a Samsung 48 inch 4K smart tv and seems like led goes on and controller in back seems like it's on and has power. Hard to find parts. Any sites besides Ebay u recommend?
When the power supply board is disconnected from the main board and checked with AC on, I can find 5V on the standby as per what is printed on the board, but cannot find the 24V in the adjoining socket. What is the reason for this? Anything to do with the bridge rectifier? Thanks, in advance, for any advice.
I have a UN55J6201AF & the layout is the same. I tested power across the ribbon between the 2 boards and got similar numbers, but when I unplug the power board from the IO board, the LED array does NOT light up, and I can’t seem to detect any voltages from the pins on that connector. Does this mean the LED’s are burned out ? What do you recommend ?
*I know this is an old video and prob not get any answer/comment but. Hi there I have a Qnix 2700 that suddenly would not power on, it just went black while playing a game. I took it apart to see if I could see anything obvious but everything looked fine. I noted the power board number MST9XG7-WV2 and tried to find one but couldn't find anything but after watching this video I put the power board back in place (without the smaller board REALLY Small one)to do what you did @0:53 and without the other board connect the standby light came on(wasnt doing anything when everything was connected)So I think I can now assume its the other board. I took a close look at the other board and there are not many components on it and I think(not 100% sure) but one of the 110v 47uh capacitors looks SLIGHTLY bulging out no discolouring and not bulging out like I have seen on youtube videos but it does look like i is very very slightly raised so I have ordered one to replace it to see if that fixes it. I wanted to ask advice to see if you think this is probably the case(since the standby light comes on without the other board connected) and to ask why I would need to get the EXACT same (smaller board)logic board? to get it to work and why couldn't I just get any? Its a 27inch 1440p so couldnt I just get any logic board thats for a 27inch tv? And to thank you for the tip which might have pointed me in the right direction.
Hope you can help with a Bn4400932C board. Upon applying ac to board 5a 280 slow blow fuse blows, continuously. All peripherals are disconnected. There does not appear to be any cold solder joints bad looking components or burns on the board. Any suggestions at this point would be greatly appreciated. Thanks for looking.
He's giving out a whole lotta knowledge if you know what you're looking at here. Thanks for the helpful information Mr. Uploader
Thanks so much for the video. By following your troubleshooting advice, I managed to fix our TV today. I found a main board for less than £5 on eBay, and that did the job perfectly. It's thanks to people like you that we can prevent (almost) perfectly working item from going into landfill. Please keep doing what you do.
Where do You get Tha Main board
Top man this guy the best on yourtube...
I wish I had found this video last week. If I had known I could do that trick with turning the backlight on by unplugging the harness from the main board, I could have saved some money by not ordering the power board. Great video
Nicely made video and the voice is very good with no annoying background music. For a retired technician like myself, he really didn't say much other than just replace the board. Most likely there was a short on the bad board pulling one of the supply voltages down. However, I would have found which line was low when it was all connected up and then try and run the short down. Sometimes the shorted part will even get hot if left on for a short time and then you can go to it. There is always the possibility that if it was hit by lighting that there could be numerous problems with the bad board. Having said all of that, sometimes to save money and headaches just doing what he did on this video is the best way to go. Tring to repair a surface-mount board can at times be a headache.
Thank you. Yeah. The part was cheap and just easier to replace and get it out of here
Would agree,more time than its worth.
I didn't realize this was a huge problem. Thanks for the info
This guy makes sence others don't, Massive Respect keeping it simple knowledge is power...
My TV got hit by lightening I watched ur video n am impressed I will go through it as u said n get back to u thanks
Thank you for this, carried out your checks and found my Samsung tv has a faulty power board. Replaced with a secondhand one of the internet and back up and running👍🏼
GREAT HELP, Thank you!! Video really stood out for the detail and explanations offered,!!
your were great, just fix my un75ju6500fxza , was watching tv screen went green then black, but I still could hear sound. watching your video, gave me the wii to try, its working mainboard.. thank you
Backlight problem
I fixed my TV because of this video. Thank you!
Thank you for your very helpful video I had a 2022 Samsung TV that would not power up. Found out the fuse on the power supply was blown. First I disconnected the main board, unsoldered fuse from the top of the board. Put in a temporary fuse and that blew immediately. Found a board on eBay for $40 and that's on the way.
Thank you. I was told that without the indicator light on the lower corner wasn't on then you have no power. So you need to get a power supply board to start with. I got ahold of your youtube instruction and found out it was the video board. Very helpful. Thanks again.
so it wasnt the power supply board?
Thank you. Your videos are extremely helpful, informative and excellently put together. An extremely good service to those learning about tv repair and electronics in general. Atta Boy! Keep up the good work.
txs man...appreciate it
Really easy to follow troubleshooting guide. Thanks for sharing. Our tv that’s less than probably 5 years old has died. Bought at Costco but since everyone abused the return policy by upgrading their tvs every year, it’s way past the 90 day return window and probably past the extended as well. Power or logic could be the issue. Measuring the fuse and verifying voltage levels first was key. I’ll do the same.
I'm in the exact same situation.. got a philips 55pus 6401, died on me after lightning strikes . Of course it's just 3 months outta guarantee. . I've replaced the power board today, but still nothing. Replacement motherboard on the way,I'm hopeful it'll power up after seeing this vid, which is v informative, v useful, subscribed.
Wat is the outcome of your motherboard replacement,I have the same tv as you replace both boards an still got nuttin
@@sirdon9304 all working now. got a donor TV, same model with broken screen dirt cheap- and took the parts out of that, direct swap with mine and it's all working fine now. Not sure how yours still isn't working, you got no standby light / ambilight/ Philips logo showing ?!
Thanks for the commentary on the power board testing. My UN55KS8500FXZA revision AA01 won't turn on and I tested the power and the cable. Going to this stage next. 👍
great video ,i have a two year old 75 inch Samsung that while i was watching ,i heard a pop and believe i saw a small sparking near where the power cord plugs in. my TV went black and will not turn back on with no lights anywhere. i haven't taking it apart yet but your video is giving me hope that I can fix it myself
Likewise
Just curious if you were able to fix this. I had the same pop and spark on my set. Hoping to be able to chase it down.
fixed changed power supply board was fairly easy tx
Was about to give up on this same TV until I saw your video. Neat little tip about the backlights and checking voltage showed me that a few of my backlights were bad and must be shorted as they are impacting the outputs from the power supply. New backlights on order so I should be back in business when those arrive. Thanks for posting this video!
Great job! one of the best video!
If a PCB is dropping the power supply voltage down to 0V, or, as in your case, causing the TV to seem to be turned off when plugged into the power supply, then there is probably a short. Replacing an SMT board is the most common solution to this problem, as you have shown. If you wanted to find exactly what component was shorting, pour 90% isopropyl alcohol over the board and, under low power of a stereo microscope, see where the alcohol dries up the fastest. The component on which the alcohol evaporates the fastest is the shorting component. Now, you can order a replacement board, substitute the shorting component from the board you ordered, and keep the board that you ordered, plus the board from the TV, as extra boards from which you can harvest replacement components for future TV and electronics repair jobs.
Frank
Frank Reiser Video/Audio Service
A flir type camera is very useful
THANKS --- a few years ago ( maybe 3 ) I purchased a 56" Samsung TV which had been a DISPLAY model at a store ( probably had been on 24/7/365 until they reboxed it to sell it ) . Purchased it cheap -- It lasted until just a few months after the warrantee expired --- I was watching it and part of the screen started to go dark then the whole screen just went dark in about a minutes time. It has been siting in the other room for the last year now. After watching a few of these videos I think I might try and tackle trying to fix it. I have no idea what is wrong but I guess I can at least open it and see.
Nicely done video. It was really helpful to me, thank you! I thought my issue was the main board but was not. I found that the scotch tape method on the connectors worked for me. Nonetheless. Your trouble shooting steps in this video helped me tremendously to narrow down the root cause of the problem!
You are awesome. Thanks for this video. I have similar problem and I will attend to the TV asap.
Nice voice and calm person... I wish I should
Sir, I've found your video to be the most useful and knowledgeable video among the hundreds I've watched. I am an electrician, but I'm not getting any readings from any of the pins from the power supply side. Also, when I unplugged the cable from power supply to the green board, no backlight came on. Would it be safe to assume the power supply/inverter is no good? Thank you in advance for any help, and the awesome straight to the point video you created for the rest of us 🤓
obviously it depends on your specific board and how its designed but yeah if there's no output then its probably the culprit. There will usually be at LEAST a constant 5v from one of the pins on all TV's. This allows it to go into a sleep mode but still keep an eye out for the power command from the remote or console power buttons.
I will look into that, thanks so much for your reply!
Thanks - just went through this for my UE48HU7500ZXZT before ordering a new power board and yes, my power supply board is fine. So now to track down a mother board. Thanks!
I have the same TV and replaced the power board which solved my problem for a few weeks. Now I have no picture. Watching your video I have the same symptoms (no picture and lights go on when you unplug that cable). Looks like I'll order a new mainboard and hope that the T Con board is not bad also. Thank you.
Thanks for the knowledge, wanted to know where is best place to purchase power boards or main board??
thank you my brother your video fixed my tv.
Electronicle, thank you for your help. I tried the simple steps of unplugging the tv for a minute and replugging; didn't work. Then took the batteries out of the remote control, pressed the on button for 15 seconds, placed batteries back in the remote and pressed the on button, and it did not work either. Your video gives me more information as to what might be wrong. There was a storm a couple a days before it stopped working so probably that had to do with the malfunction. I will follow your instructions before I decide to get a new one. Thanks again.
Thanks a million for your amazing videos, it's been a long time since I last fixed one of these tvs but I remember you doing it before and I just need to say thanks again for such great work 😀 👍
Thank you! Glad they helped!
Yessa.. same situation, worked great, storm hit. Hdmi ports stopped working. TV works periodically, sometimes the tv will turn on and off again without actually booting up no matter how long you leave it unplugged. Pretty sure since the hdmi ports are toast and it does power up sometimes it's almost gotta be the main board huh. Think I'll give it a shot. Thanks buddy.
Very informative video, good testing. I am currently checking my Samsung UN55J6200DAF bcuz a few days ago, as we watched Tv, we began to hear crackling at the rear of Tv and it went dim blue, then black. It turned off with remote, but I disconnected everything off the wall outlet as precaution, bcuz I also smelled burnt wire. Watching pertaining videos, I checked fuse, its good. I inspected all 3 boards and only at the power supply board did I see like melted wire plastic. I could not see anything unusual on the main green board, it has a red lit port. The T-con board seemed ok as well, it has blue lights when I power on. Odd thing is, she turns on with power button and remote, but will only turn off with remote. I tested all LEDs thru the corresponding wire leads and many did not light. I tested the port pins from where the LED connector goes, and it had No current going out. I did perform the test you did, unplugged cable connector from main or logic board and did get the four 12.65v results in those leads, plus the 4.50 power on voltage of other set. One thing is for certain, I am going to replace All the LED strips with new. And Im prepared to replace the power supply board as well. However, I am not sure about the green logic/main board. Waht say ye..? I'd appreciate any input. (incidentally, this Tv is 7yrs old, was working flawlessly).
Here was me thinking that I would have to get out a soldering iron, when all I have to do is have a spare power board and main board for every TV ever created :-)
shop jimmy has both of them for EVERY TV....used them years ago for another tv i found..........WAITING FOR A NEW MAINBOARD FOR A 43 INCH LED lg tv....works awesome minus both hdmi,s are shot......$35 here friday....30 minutes ..done...rather have hdmi to my pc...then to ethernet cable only....smart tv,s are not as smart vs hooked up to a pc....fact...
Man dude I was thinking the same thing
Very nicely explained.
Thank you
This was put together very well. Thank you sir.
I have one of these that recently went bad, I've inspected the outer board and checked all the caps and diodes, I even removed some components to see if any were dead but they weren't. I didn't try the outer up with the cables removed though, I will try that later. It could be the same board I have problems with!
Thank you I will follow your instructions. I have the same problem with a LG screen 40 inch probably. Just curious what the problem is and if I can fix it. Good challenge
This video, actually helped me pin-point the issue of my TV. Now, to order a new motherboard!
Thanks for the tip I think I can do it
This was helpful thank you lol sadly i saw that my motherboard was blown so is there any links where i can buy some new ones
Yippee I fixed my tv. I have the parts and I swap them out one at a time and found it it was the main power source the first one that you tested to be the culprit. I put all the new parts in anyway and we'll save the ones that we're not the culprit for future use. I figured I had the TV open and I already had the parts I might as well switch them out. I'm so happy and it didn't cost me a penny. 12 years ago Best Buy was just supposed to fix my TV in the parts didn't show up on time so they brought parts then when the other parts arrived in the mail I just kept them for future use and I'm sure glad I did because now it's like I have a brand new TV. It's a 3D TV plasma so they don't make those anymore.
Very nice work!
Good video. Have a 6900 series that a storm took out. On it all the boards are in one. All it has is backlights. I'm waiting on a replacement board to come in the mail and hoping it will fix it. 60bucks will be a lot better than $410 for a replacement.
Thank you for this video it really showed me a lot it seems like my TV has the same issue as the one you were fixing but now I'll check it to see if it's my main board or not
I was able to repair a 60 inch Samsung TV 2015. You are the best!
hehe i have my tv laying out here, with a similar problem, so was gladly following your instructions as a complete electro-novice.
1. Check power supply pins one by one. check, they're working, same as in the vid!
2. Get second hand mainboard supplied by owner... crap, dont' have that.
Anyway thanks for sharing, the tip for unplugging the mainboard to see if the backlight was working was very nice to know!
I had the same issue and was able to spot some hairline cracks in some old solder connections. I just tapped both spots with my soldering gun and got it back up and running. Haven’t had any issues since. The cracks in the board were only visible on the back side of the board after unscrewing.
Great video. My samsung UE40EH5005K just died yesterday and I really can't afford a new one right now, basically not even used.
No standby light, TV doesn't turn on.
Took the power board off today and tried to check with my dad if something's wrong but we're no experts.
I'm gonna try that backlight thing tomorrow to see if the power board is just dead. There is an area where the board is darker but visually to an untrained eye couldn't figure it out.
Would be really nice to be able to fix it rather than buy a new tv.
Thanks for the post! Where do I buy , find the board you changed ?
Loved it basics on finding the problem board and fuse check
Very helpful my televisions died all of a sudden and its 3yrs old I tried everything to get it to work.
Now I see how easy it is to fix,I guess I'll just take it to a shop and have them fix it.
Hope they dont over charge me!😥
Thanks for sharing.👍😊
My Samsung, that I purchased 9 years and 3 months ago, had the front red LED still flickering in response to the remote control device, but that was as far as it got. The screen and sound remained OFF, and the red LED would simply remain ON instead of turning OFF as the screen and sound come to life. So step one was to check all the PCB electrical connectors to be sure there is no oxidization. Once each of them were cleaned, I plugged them all back in, and bingo, my Samsung LN32C350D1DXZC TV was up and running again. That was about 2 years ago, and it is still running perfectly today. Long ago, I did also add a fan, to keep the TV much cooler, and thus keep the electrolytic caps much cooler as well. That one little old CPU fan made a huge temperature difference.
Thanks thats a great help for me...
Where can I buy a replacement board as the one you replaced? I have a Samsung model UN55H6350AFXZC
Your diagnose was good but you stopped to early. There is a mosfet on the board that you should have checked, it is for the power of the main chip that shorts. Just check for the legs to short and if it is shorted change it, you can get 10 of them for $5 and a lot of Tv's all use the same or very close.
I agree he should have kept going …..but perhaps he had spare boards on hand or the board was less expensive than his time to do component level troubleshooting. But certainly this video can help a lot of “ laymen” salvage their tv by showing that’s it’s not overwhelming or that you need to be a rocket scientist
thank you! I will ask my son to do this.i'll let you know how it went
How'd it go?
Thank you for your video. I ordered a kit...replaced mother board, toggle and wifi and I’m up and running again.
Great Job!
Where did you order your parts from?
Help Needed. I have a 65 inch Samsung SMart TV, It started Restarting and then few days later it stopped working totally. Now its not even turning on. No gave it to Service Center and they are saying the Panel of the tv needs to be replaced ! All backlights are fine, Power supply ok, Mother board is also ok. Is it right ? The panel is looking good (means no physical damage ever) Plz help...
Ive seen alot of these videos and in most cases its like get to the damn point. Your video wasn't like the rest which was koo... From my experiences and just having nothing better to do, if you grew up not having all the money in the world and things broke; for most that's how you learn to become a handy man. So for the people on here watching these type of videos and say "its because of these videos that gave you the push to jump in and trying to fix it yourself " i 👏 applaud you guys that's all it takes . To be honest 7 times out of 10 of all the tv's i fix here and there, its really only the Capacitor's and the ribbon cables that go bad and its really easy to fix those. As long as the lcd monitor or l.e.d's are not broken then usually what i just stated are usually the culprits.. If your an unlucky one it might be something a lil more but like i said if it isn't the screen or lights its easy to fix these things.. I got sick of seeing and hearing how people get ripped off for a fix that really was only a 5$ fix but getting charged about 100 then an additional 60 to "order" a part smh.. Good luck to all of you who are trying to roll on your own to fix your stuff don't get bamboozled by con artists.. Good video too!
Thanks, very informative. ..
Great job! Thanks!
Great video. Can you show video of how to repair/replace optical/audio socket on 2018 Samsung UN6900 smart tv? Worked until optical cable was pulled against when earphone adapter unit was pulled off of dresser and it hung down on the extended optical cable. I can feel that the optical/audio socket is loose. Can you show what parts or electrical board needs to be repaired/replaced? Thanks a lot.
Thanks for your imformative video but i thought the power board only gives the dc outputs when it gets a command from the main board so how did you measure those voltages?
It is easy to repair such a way by changing with the another ok board.
If you look for the faulty which caused it you can be a good repair man!!!
My little boy at the adged 12 can do it very easy!
Kinda dissapointed, I was expecting a component level repair...
t0nito just bake the board in question in the over and reflow the solder. 9 out of 10 times it could just be a bad solder joint.
Modern control boards are not easy to repair. Capacitors, diodes, resistors, etc are really tiny and difficult to desolder/solder. You’re better off replacing the whole unit.
Me too that’s what I spent 6-8 years training to do. 94-2002. Now it’s all smd so it’s to awkward to do. It’s all digital so the circuitry is completely different too. Used to love getting the circuit diagrams from reference library at college and in the village where I lived (about 1000 people) I was the man they turned to. I did it really cheap and sometimes only broke even but it was pocket money. Used to get help training at college. I still fix my own VCRs and CRT TVs but nobody else want ps anything doing. It’s the throw away society and the market is flooded with Chinese crap with no diagrams available.
@@joelshack85 That will usually work with LG, however I've never seen it with Samsung. More than likely it has a shorted capacitor on the main board.
berryelectronics yea baking sometimes Is my last resort to try to fix it.
Great video, is it possible for the sound board on this type of TV to cause the PSU board to burn out?
Hi
Thank you for your video extremely helpful I’ve got similar problem with my TV Samsung UE55F8000ST.
I’m trying to find out which board I’m having a problem with. Is it the power board or the main board so I followed what you have done in video. I plugged it in And disconnected the cable from the power board connected to the main board it should have to trigger the back light to come on but I am getting the back lights come on and off on and off not constantly on so I am confused please help thanks
I enjoyed that, do you use a ground strap ?
nope. Not for this type of repair.
Big Thanks!!!!
So it seems I have the same 2 board set and connector layout as in the vid. My power pins check out (12.8v) to include the 5v on/off power. However I did not get backlight when I disconnected the connector from the main board. So otherwise I would think the main board with that issue but still considering power board. Is that a must to have back light when determining if the power board is good or not?
My UN60JU7100F wont power on. I have two black cable sets coming out of power board. Removing blk set that goes to mother board from power board does not turn on back lights. Removing blk set that goes to Tcon board does light the back lights. Also removing the two whitish ribbon cables at bottom of Tcon board turns on the back lights. What do you think ? Thanks in advance.
Thanks, my wife tv will not turn on so now with ur help to look n test I will be able to get her TV going, once again thank u
Sir no need to repair the pcb ? or just replace a new 1 pcb?,thank you.
Thanks for the great troubleshooting walkthrough. Who can source the boards in case one or the other goes out? Thanks!
I've always looked on places like ebay
I'm wondering if you have some advice. I have a 70 inch samsung 6 series TV. I'm not super familiar with new tv's (been a decade or so) I know how to replace boards and stuff. I've been trying to trouble shoot this. In this video you show how power goes through and mine does the same and is fine. I also have access to replacements and replaced both the power and main boards just in case. I'm still getting the same thing. Led blinks twice intermittent. in the back I can see the backlight come on full for a second or two, off then back on real fast to dim backlight for a second or so and then off. The flashing and the backlight go through this series over and over.
I have the same issue. Where can you find the replacement logic boards? Thanks in advance. Great job!
man I could really use your expertise on my 5 yr old Samsung 46" LED LCD $1,200 thin smart model tv, it was my favorite period. but niw it doesnt turn on any more 😞😞
Hi there,
Thank you for the video, I did change both boards and still nothing. There’s power but tv doesn’t turn on! Could it be the T-con board?
I may have the same problem as you. I only changed the power board. Main board still thinking about it
Thank you, Thank you, Thank you. The $120 main board I just replaced saved me a $1,000 on a new tv...
Where did you order it? Please .
@@mareknosek996 Sorry. its been so long ago I forgot. Just duckduckgo the part number and call everyone that shows that they may have it.It is a very very very hard part to find...
@@deplorabledreg2935 i found it ! Thanks again for your quick response! Have a great day my friend.
@@mareknosek996 AWESOME!!
Should take about a half hour to replace. Your remote that came with the tv will no longer work with your new board.
@@deplorabledreg2935 Is there something i can do for that ?
Where do you suggest to buy new power boards please. Thanks for the great video.
Thanks for the video that will help me fix my neighbours TV that went off after a power surge or lightning strike. Would be nice to know what component that failed.
Excellent 👌 👌👌👌👌👌👌
Working trick 💯% working
Thanks for help
I subscribe you
Thanks for the video. Found a Samsung 48 inch 4K smart tv and seems like led goes on and controller in back seems like it's on and has power. Hard to find parts. Any sites besides Ebay u recommend?
try shopjimmy.com
Question can you Replace either continents with ones from another television that’s not the same brand?
Great info Thanks
Very good video thanks
Thank you for that video makes sense
thank you for your video
Your video great thank you.but I did the same thing I got my tv fixed but The writing upside down do you know how can I fix this program?
When the power supply board is disconnected from the main board and checked with AC on, I can find 5V on the standby as per what is printed on the board, but cannot find the 24V in the adjoining socket. What is the reason for this? Anything to do with the bridge rectifier? Thanks, in advance, for any advice.
I have a UN55J6201AF & the layout is the same. I tested power across the ribbon between the 2 boards and got similar numbers, but when I unplug the power board from the IO board, the LED array does NOT light up, and I can’t seem to detect any voltages from the pins on that connector. Does this mean the LED’s are burned out ? What do you recommend ?
*I know this is an old video and prob not get any answer/comment but.
Hi there I have a Qnix 2700 that suddenly would not power on, it just went black while playing a game. I took it apart to see if I could see anything obvious but everything looked fine.
I noted the power board number MST9XG7-WV2 and tried to find one but couldn't find anything but after watching this video I put the power board back in place (without the smaller board REALLY Small one)to do what you did @0:53 and without the other board connect the standby light came on(wasnt doing anything when everything was connected)So I think I can now assume its the other board.
I took a close look at the other board and there are not many components on it and I think(not 100% sure) but one of the 110v 47uh capacitors looks SLIGHTLY bulging out no discolouring and not bulging out like I have seen on youtube videos but it does look like i is very very slightly raised so I have ordered one to replace it to see if that fixes it.
I wanted to ask advice to see if you think this is probably the case(since the standby light comes on without the other board connected) and to ask why I would need to get the EXACT same (smaller board)logic board? to get it to work and why couldn't I just get any?
Its a 27inch 1440p so couldnt I just get any logic board thats for a 27inch tv?
And to thank you for the tip which might have pointed me in the right direction.
Any good places to actually purchase these boards and if so what cost are they usually?
I’m having trouble actually finding a replacement board for my Samsung. It has the BN94-12725q board. Any ideas on where to get them
Hope you can help with a Bn4400932C board. Upon applying ac to board 5a 280 slow blow fuse blows, continuously. All peripherals are disconnected. There does not appear to be any cold solder joints bad looking components or burns on the board. Any suggestions at this point would be greatly appreciated. Thanks for looking.
I don't have the backlights when I unplug from the power supply. Power reading were good. Is the logic board bad?
Thank you That Help Me AHold Lot
awesome thanks now i need to find my board for my tv UN55FH6200 2013-2014
SAMSUNG