TV Will Not Turn On Troubleshooting Help - LED, LCD & Plasma TV Troubleshooting TV Will Not Power On
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- Опубликовано: 8 окт 2015
- How to test for standby voltage to determine if the problem is the power supply or main board.
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In this video we will show troubleshooting steps that will work for a plasma TV, LCD TV & LED TV. Troubleshooting in this video will apply to a TV that will not power on. So if your TV will not turn on, either with the remote or by pushing the power button on it, try these troubleshooting steps.
In these troubleshooting steps, we will use a multimeter to check for certain voltages. In order to continue troubleshooting, be sure you have the proper training, experience, skills and equipment necessary to use a multimeter to check voltages in a TV.
Try all repairs and troubleshooting at your own risk.
Here we have an LED TV that will not turn on. The first thing that I can do is to check and see if there is a standby light in the front of the TV. Some TVs have the ability to show a standby light, while others do not. If I do see a standby light in the front of the TV, that shows that I do have some power going to the TV, but it will just not turn on.
We will continue troubleshooting.
I have removed the back cover off of the TV and I will use my meter to check the standby voltage on the power supply.
First identify the power supply in your TV. Then look for a cable that runs from the power supply to the main board.
Then you can look to see if the board has a legend on it, showing which pins show what voltages.
You will want to look for the one that shows the 5 volt standby. All boards are different, some will have a legend, some will not. Some will have the pin labeled and some won't. If your board does show what pin has 5 volt standby, then check that pin. If it does not show which one if the 5 volt standby, then you will want to check all of the pins on the cable, one at a time and look for one of them to show as 5 volts. As you can see, both pins 1 and 2 show our 5 volt standby. I will check pin 1. Be sure your TV is plugged in. After you check the pins, if you do have 5 volt standby, but your TV is not powering on, then I recommend replacing the main board.
If you do not have 5 volt standby, then you are not getting power from the power supply board. Assuming your outlet works, and the TV is plugged in correctly, I recommend replacing the power supply board.
A quick recap of our first step for troubleshooting the symptom of if your TV will not power on. If you check the 5 volt standby on the power supply, and your meter shows 5 volts, then your power supply is working, but the main board is not turning on the TV. So, I recommend replacing the main board. If you check for the 5 volt standby, and you do not receive 5 volts on your meter, then your TV is not receiving power and I recommend replacing the power supply.
This testing is a great place to start for troubleshooting these symptoms. In some rare cases, if you do have standby, and your TV will not power on, the problem could also be a component on the power supply board, however to start troubleshooting, it is recommended to replace the main board first.
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Thank you so much for this educational video!!! By your multimeter test I needed a power supply board. Unfortunately the power supply board I needed wasn’t in stock on your website but I did find one on eBay and now my TV works again! No TV repairman costs at all since I was able to diagnose and fix myself. I’m in a debt of gratitude and will refer everyone possible to your website, videos, products...etc. Thanks!
I have a Toshiba 40e210u1had this problem....after watching your video i figured out that I did have the 5v standby on the power supply so I replaced the main board as suggested. The Tv is now working again, thanks shop jimmy!
I am so glad found your channel
Mate, you're a legend. Such a lovely voice!
Sounds like guy with glasses from Harold Ramis from original Ghostbusters
Thank you for Your info!! Great Video
Wow. Dat was epic. Da best repair is to replace da faulty part. Almost like replacing a flat tyre. Congrats man.
Yes, except a flat tyre doesn't have a 5v standby (well I don't think it does)
I spent a lot of time researching and studying everything I could with no luck!! I tested all transistors and caps with meters and out of circuit then replaced all the boards and still no luck one board was used and that my have been the problem or maybe something with something else it was a lighting strike so who knows. but thanks to all who helped!!
Immensely helpful!
nice video and good explanation.
Thanks you very much!
Hi Jim, thank you very much for your video. I have a Sony Bravia 60" kd-60x690e TV that is five years old today. It turned itself off, and will not turn back on. No lights, nothing.
There was no surge. I removed the plug from the surge protector, and plugged it into the UPS, no change. I plugged it into the wall outlet, no change. I'm guessing a power supply board.
When I watched your video, I could not tell where you grounded the other probe. Obviously, touching one probe to a connection, and leaving the other one dangling will not complete a circuit for electricity to flow. Where did you ground the other probe?
Thanks.
Thanks,
That was helpful but in my country we do more repair them replacement
I bought the repair kit from you guys for the dps-162kp a power supply im wondering if you have a tutorial for testing and replacing each component in the kit.
Hi Jim love the video troubleshooting ,I have a 40 inch pioneer plasma t.v it'll play for about a week than it goes out for about a week than it'll play again what could be the problem. Thank you
Hello,
I like your service and commitment to help / guide the community to repair the TV.
I have a Sony TV - model KDL52XBR9. It has a blank screen - no video or audio or backlight. When I turn ON with Remote or Power button on the TV, just the Green Standby light comes on.
If I disconnect and connect the wall plug, I hear some rely clicking and the backlight comes on for about 45 sec and backlight turns off by it self. Green standby light remains ON till I power OFF.
Can you please help diagnose the issue?
Thanks, Mohan
Hello Jimmy. Great video! I have a lg 55ln510, #310rmhr7b601 that will show picture for 30 sec and then the screen goes black. The standby light is on when tv is plugged in. I have checked the standby signal from pwr supply to main brd and get the listed value of 3.5V but I get a 0 for the 12v and the 24v pins. The pins for the wire going from pwr supply to led (+/- +/-) started at approx 13v and quickly dropped to 0 when tv plugged in but not turned on. No visible blown capacitors. Any suggestions would be appreciated. Thanks!
Hi, I have a 32" Phillips flat screen T.V. - Model no. 32PFL5522D / 05 . All was fine until a few days ago when I went to turn it on via the remote and nothing happened. The standby light has never come back on when plugging into the power supply. Have tried all the usual tricks by checking the fuse in the plug, plugging T.V. into another socket in another room - no joy. I am about to take off the back of the T.V. and go through the steps as advised on your youtube commentary. It makes sense to do what you advise about checking the standby voltage etc. Just thought I would post this prior to starting the checking procedure in case anyone has any other types of advice before I start.
Thanking you in anticipation
Ian J.
Sylvania (Funai) 32 inch LCD that powers up and run for about an hour the shuts down, I recapped it, replaced power resistors that were open and the rectifier diodes and that brought it back to life to it's current state now. This set has a split power supply (AC mains / inverter board and system PSB.
Hello, what type of mutimeter are you using to check the power supply board?
I have an LG 42LD690 TV. The power light shows in standby and goes to a wavering red light when on button is depressed. I have checked the power rails to the control board and they are ok. What outputs can one expect from the other outputs to the LED's? At the moment there is zilch. I have no picture.What and where do you think the problem area is? Grateful for any advice. The TV is only 5 years old.
hey jimmy I heard if you have a emerson model LF501EM4 A RED BLINKING LIGHT CAN BE AIR SENSOR BOARD
Thank You
Hello Jimmy, How to look for correct Voltage on Sony G1D board (XBR-65X900C). How voltage should I expect ?
HOW WE IDENTFY THE CABLES FROM THE FB,HT,VERTICAL IC AND SO ON
Hi Shop Jimmy, Nice video, I have a LG, LED 55LW5700 tv, I checked all voltages all are goo except the "power on" voltage. It should be 24V and it is only 3.5V, All other voltages are good, does this mean my main board is bad?
hey, I have a power supply board with standby votlage. I shorted (using a tweezer) standby voltage to the power on pin to turn the tv on. then measured the unregulated 24v output and was only reading 1.4v. What could be the problem? I have a sony dps-162lp board
Thanks for the great effort... I have a problem with the Samsung lcd-la32e420, and the problem is the following:
When the power cable is connected to the power, the screen flashes and turns off immediately.. for the knowledge that the voltage measurements from the power board come out intact, especially 5 V.. Can you help me to solve this problem
I have a TCL 49S403. Do you know which pin is the standby or should I just check each pin?
I ordered a replacement power board for a TCL 55s401 (2 years old) because I had no backlights. Flashlight test confirmed there was a display. I installed the new board from ShopJimmy and I get no response at all; not even a standby light as I did with the old board. Thanks for any help.
What if your getting 3V with PS-ON? I do not see 5V stand by but all other volts on PS going to main board check out.
Hi, I have a Phhillips model- 24PFL3603/F7 the only thing that turns on is the Optical cable light, any idea what it could be.I changed the board and all the same. Would appreciate any help, thanks.
I have a Sanyo model DP42D23 TV. It has a new P.S. board with all voltages good at the cable coming from the Main board. But it still doesn't come on .There is no standby light that is on. I went to the other end of the ribbon cable from the P.S. Board to the other rf/tuner/line out/in board and all the power and gnd's are good to that point. The board number on the board from the P.S. is NO: PCB J 0995 D1 W46/13. Other numbers on the board are Z7L 305A 49. Not sure if that helps. The power on/off button doesn't turn it on either. I do fine voltage across the power button when press. But still nothing happens from that point on.
Do you think it's that board?
ty is on the picture comes on and off on and off just had the power supply replaced 3 days ago for same problem
Hello, I have a LG plasma tv model 50pj350 with sound but no image. I checked the power board and it is working, changed damaged mosfets on YSUS, caps read ok, so do resistors and diodes. Though the VY and VSC testing points shoud read -198V and 135V and I have no more than 60 volts on each. Any sugestion? I’ve tried to get the board diagram with no success. Thanks.
Hi SJ as I was watching your video I ran a few test on my Hisense 50H7GB TV. I notice that when I press and hold down the power on the side of the TV the Hisense logo comes on and the TV picture comes on. The TV well stay on for about 2 minutes then it turns off. I have not opened it yet. Could this be a symptom of the power board?
How could I test my power supply board My board is a APS-352 IS THERE ANY specific testing there in your line thanks
My 3yr old Vizio 50in went out so I bought a new board from you. Put it in and it fired right up, worked for a day, turned it off and couldn't get it to come back on. You were supposed to replace this board when one came in. I was told you get a lot of them and would notify me when one came in. No one ever notified me!! I'm still waiting.
do you need to ground your self before starting this process? If yes then how do you do that ? That might be helpful for your viewers. Thanks
hi sir you
i want to ask about a samsung tv le37c630k1w
this tv has only remote control no power key but i have test the remote is ok
if standby voltage is ok so in your opinion the problem is the mainboard ?
its not needed to check the other voltages of the power supply ?
the red light of standby is permanently light and it seems to be permanently steady
it doesnt blink when i give power on from the remote control
on my samsung un46z7100wf, would these instructions be the same, I have a red blinking light, and is there a difference between the ld and the UN, thanks tony
Hi Recently my LG 42 inch TV had backlight issue where video alone was not viable but that was too viable through flash light test. The service technician changed the back light LED after which the TV went to standby mode.
Initially he replaced the main board still it was in standby. Then he changed the power supply board. Still same issue . He change TCON board even the issue persist.
But finally when I asked him to change back all three to old board and when testing he was able to recieve supply to all boards. Which initially did not happen.
Now with all old boards and backlight alone changed the TV still stays in stand by mode.
I feel the technician is not having a sound knowledge on the issue and just like that he is saying the LED panel has to be changed.
With your experience do you have any idea on this issue.
Any small hint would be great full.
Thank you.
Follow up - I left it unplugged over night, and it is now working. Yeah! Any thoughts on why it would have done that? Is a major failure imminent? Thanks.
have a sony kdl-60w630b it has a solid red standby not blinking and will not turn on. any sugestions
Hi!! Thanks for those videos. They are helpful!! Well, I would appreciate if you can give me some advice about my problem.. I have my RCA LED TV wich after a thunderbolt won't turn on.
I checked it up and found in the cold section, just after the optocoupler, one component tag as R431 (SOT23 encapsulated) exploited and close to it there was this component tag as SBR10100CTB (I think it's a rectifier), this one was in short circuit. I replaced them but still my tv won't turn on. I can see after replace those components I have 12V in cold section and dc volt but I don't see the 5v for the processor and the other part of the mainboard. Any clues? The mainboard part is TP.MS3393.PB855
Thank you. I am from Russia. And your English is very easy and I can understand it. It is great
Hi. I have a Panasonic viera plasma TH-42PZ80U TV that will not power on. The red light next to the on button blinks ten times. I am guessing based on research googling the 10 lights, it is the power supply board etx2mm702mf-n. Is that right? Will replacing this board do the trick? Can the board be purchased thru you guys?
Thanks, Dick and Norma
My Vizio LCD sometimes won’t power on. If I unplug and plug it back in, it will work for a while. Occasionally, it’ll turn off by itself while I watch, and I can usually just turn it back on. Also, if I haven’t used it for a few days, it sometimes won’t turn on. Unplug/replug seems to fix it as I described above. Power board failing?
I have a Samsung 55" LED Smart TV that during a recent storm made a loud crack sound and shut down. I have verified that all items in the surge protector still work, but the stand by light and power to the tv does not. If I follow your videos, what kind of price might I be looking at if one of my boards needs to be replaced? Before I invest all the time and money I would like an idea if I should simply buy a new tv and if so, what brand would you recommend?
Hello, I have a 12 month old vizio e48-c2 that will not power on (it began after a storm so, lightning is the primary suspect) I've removed the back panel and the components look like none I've seen on line. There is a small board at bottom center roughly 2x6 inches connected by a ribbon to a larger panel at 3 o'clock roughly 8x12 inches.. I can replace the the tv with a new one for $388. Can you tell me what the cost to repair might be? Is it possible that only a fuse is the culprit? Thank you.
Kind regards,
Billy Hardwick
I have Sharp 58Q733Ou and have replaced all 5 backlight strips. Using LED tester at wiring harness, will not light LED strips/ showing open circuit. Have replaced wiring harness but still shows open. All 5 strips light when tested individually. Not sure what is causing open circuit. Thanks
Thanks
Super 💗
hi my tcl flat screen comes on then back off no picture just a white flash line...... advice please....
I have an Element ELEFW328 curb orphan I took in. It's Main & PS boards are combined into 1 disappointing failure.I plugged it in standby light came on, hit the pwr button but no picture. Replacement board was only $12. I put it in and same results. I measured voltage at the power switch this time. The board that it came with had 0v. The replacement board put out 6.6 at the power switch. I'm corn-fused. What do those disparate voltages signify? It the power switch bad? I dressed as Uncle Fester last Halloween. I was going to wear the same costume, but say that I'm Rudy Giuliani. Do you think I can pull it off?
That's pretty good. However, I thought it was going to go into checking components and repairing the board instead of replacing it.
Replaced power supply on 50S425 TCL TV but picture is way to big for screen. Tried factory reset but did not work. All menus show on screen and work but they are just too big for screen. Audio works well also.
I have a Dynex TV Model Number DX-40L261A12. The TV will power on after unplugging then plugging back in. It takes multiple times to do this. I do have the red indicator light that stays lit. Once the TV is on the picture is still excellent and everything works. I did try another power chord and that is not the issue. What do you think it could be?
I am looking for a circuit board for a 42 inches flat screen TV model Rc42D1_A
Hey Jimmy
I have a plasma tv to fix. Lg plasma 50pt350ud is the model. The tv comes on and screen lights but no picture. It will not allow channel change or input change those buttons are unresponsive when pushed. It has no picture or sound.
If I bought a control board just recently to find out that it is not my Version after replacing the power board I still cannot get the TV to power on mine is a Samsung UN50KU6300FXZA DA01 version and I believe the board I installed was a DF08, is there a difference on versions for the control board that you cannot see that would make the tv still not power on, the circuitry looks identical? Any help would be great could it be the P jog switch? or do I just need to order the proper control board DA01 version
Hi Jimmy,
I have LG 70inch full HD Led tv, unfortunately it does not power on, I showed it to a tv mechanic and He said that display panel is not faulty. Replacing a display panel is too expensive, is there any other way or any alternate method.
Hi, tv has standby light but goes off as soon as picture tube wanna turn on, what can I check for?
Hi,
Is ther an over voltage protection on the power board?
Sony Bravia 55" KDL-55HX800 model.
I had a power surge which kept my tv from working properly. At
first it would turn on and have a picture, then turn off. I got it to
work for about 10 min. before it shut down permanently.
The red LED is flashing 3 times in sequence. After trying to turn the tv on, the green led clicks off back to standby, red led, and changes to 7 blinks. This is repeated every time I unplug the direct power cord and re plug several
min.'s later.. I will test the volts from supply to main as shown in your video, but do I have any other problem I should know or worry about before I attempt to test or replace anything?
Im looking for Proscan 117736 (RSAG7.820.1185) Power Supply Unit. I think it may only be a fuse can I get one of those while waiting for the power supply unit to get in stock?
I have a SamSung 59" D6900 Series 6 3D Full HD Plasma TV that was manufactured in 2011 that will turn itself on and off every few seconds and is stuck on PC input this first happened over a year ago when I was switching the input source from one source to another too quickly and I was reluctant to dispose of it because when it is on the picture is near perfect ! Very annoying problem if you have any suggestions what part I might need to replace (if I can find one for such an old TV) that would be very helpful thank you.
I have a lg plasma 60pm6700-ub. I believe it was stuck by lighting as the surge protector shows it is no longer protecting. Standby light will blink, when I try to turn on screen shows a faint gray color but never shows picture or sound and then appears to turn off. 5v standby pin (what I believe is the pin) one shows around 4 volts(first time using meter). Any help appreciated
Is the power board LF501EM4F (A3AUGUH) interchangeable with the power board LF501EM4F (A3AU0MPW)? Thanks!
Hola no se mucho ingles pero..Necesito ayuda con la reparacion de mi led tv, tiene el problema que muestras en el video pero la placa es de esa familia china TP.VST59.P83 y estas vienen fabricadas con la fuente y todo en una sola placa, espero me entiendas.
I have a VIZIO L37HDTV10A. The power light is yellow on the front when it is off and turns on to green when I hit the power button but the screen does not light up. The problem started a week ago when it took longer for the screen to appear and now it will not appear at all. Haven't done anything yet to the set but will take the back off soon. any hints. The video I watched here advised to check the pins for power if it is labeled. Any further help?
Where do you put the BLACK multimeter tip ?? (Ground) while you touch the pins with the red one ?
I have 5v on SB pin of PS but 11.6v where I should be getting 12v and 19v where I should be getting 24v...Any suggestions? PS or mainboard replacement? Thanks.
Jim I have a lg55- ug tv and it turned off on me because my outlets burned out with the tv was plugged in too now the tv don't turn on but I do see a red light when I plug it in . Idk with one to change first ? Pleas help
Hey bud. I have a vizio, the power does not want to come on sometimes, but when I unplug it and plug it back in it turns on, the other day I had to replace the fuse in the psb. I am wondering what is causing the fuse to blow and what is causing the the power cycle issue
What is a Multeye Meter ?
And what has the eye have to do with it ?
I have a problem where my old board gives me power to light up led on front but he board I bought from shop jimmy doesn’t. Any thoughts? Am I missing something? Could I have gotten a bad board from you guys?
I have a rca mod #led42c45rqd ser # 2505-ld42c45d100735. The picture would shut off but the sound still worked shut it down and restart and it would work again. Now it starts flashes on for a couple of seconds and turns off. I looked at all the capaciitors and did not see any that looked bad. I only see two boards power supply and main boards. Where would the T-con board be located?
Jimmy I have a Polaroid
TLAC-02255 and I conect the power cable and the standby light torn on red , When I turn on the tv the red light changes to blue and tries to start the screen apears the logo polaroid after a few seconds turn of and change again to red. I check the power supply and have 2.9 volts when turn on changes to 5volts and after few seconds changes again to 2.9volts
Hi there looking for some advice I have hitach tv that there is standby light but it flickers blue to red etc pressing the button the tv doesn't come on also my board doesn't show what pin is the standby volt. Do you have an email as I have photo of my board to see if you can help me
My 50" Panasonic TV TC-P50U50 when plugged in the red led light is off. Pushing the power button on the remote will turn on the red led light but not screen or sound. The red led "does not blink". The remote will not shut down the TV or do anything, have to unplug to power down. I tested the power supply board (MPF6913B 1Z) at the output pins and no 5v standby voltage. Which is odd since I have the standby red led. So would it be the power supply board or would something be happening to my main board?
My Sharp Aquos picture went away when I changed channels. I had sound but no picture. I turned it off and on but then had nothing even after unplugging it.
On the front of the TV I have the OPC and Power lights flash together with the Power light flashing two more times before the sequence repeats.
I have tried several of the suggestions to push buttons to reset with no luck.
Inside on the Mainboard there is a light near number 20 and TP2003 label that flashes constantly until the TV cuts itself off. I exchanged the power board but no change. Should I replace the Mainboard? If that gives me a picture, will I need to do a reset procedure?
I am a repair tech with 25 years experience in the repair field with a big communication company in Jamaica.The problem I have is with a Samsung tv model number UN32F43AFXZP the fault is it will not power up when the power button is pressed. The power light come on then flash 5 times the off. I have taken out the power board inspected it the caps seem good then I checked all of them they are all good. I power up the board by it self all all voltages are present. Can you enlighten me as to what might be the fault and if it is the main board or power board where can I source these boards appreciated in advance
I have a LG 65” TV model LT-65N550Z but can’t find parts on the net. Power board or Mother board
I have a Toshiba 40RV525U that will not turn on after sitting for 1/2 hour or more - or is cool. To turn it back on after it is cooled, you have to turn it on an off approximately 11 times. Once on, it functions perfectly. What's going on?
hi jimmy. i have a sony aps-319 . what happen is when turn it on, it just shows sony on the screen and dark back without any image' what do you think that might be the problem?
Are you putting the negative meter lead to ground?
Have Sharp Aquos LC 60LE831U will not power up. No stand by voltage. Have not been able to find one. Checked you, Amazon, even Sharp. Found bad diode and will replace this in the mean time but in case this doesn't work, can you suggest anyone else I could find a Delta DPS-183BP A. Rev S4?Thanks
Super
I have a MITSUBISHI MODEL "WD-60638". When I turn the TV on nothing happens nor does the indication light come on. I tested the 5V test area on the power board and got a varying 1-2V reading. What would you suggest i look at next. Thank you for your time.
I see your red + cable going to the pin on the power supply board. Where do i touch my black lead from my meter? Thank You !
Put black lead to the ground anywhere to the tv metal body
I have standby 5 volts. I don't see any standby LED lit except LED on Network Port on Main. Power button does nothing. Main board is expensive. Is there any way to jumper or "trick" power supply to fire up the 12v side for further testing?
Hello, I have a Samsung PN59D8000FF that has stopped working. Symptoms include: power standby light on, logic board LED2000 lights up in 5 second intervals. Power supply voltages at Vs/Va and standby-ON are 0.000v (nothing). In a dark room I can see the screen flash when turning on/off. Would appreciate any input.
Suggestions on where to start if the tv turns on for a few seconds then powers itself off? When it turns on get alot of white static on the bottom 1/4 of the screen. Have looked over all the boards with a magnifying glass. Do not see anything blown or damaged.
Replaced all boards on roku TV 49l621u and turns on then off right away.power board shows all good voltages.the digital audio light stays on ,on the main board.Could it be a bad inverter?stand by blinks then goes out.
Hi Jimmy. I have a Panasonic TC-19LX50. The stand by light turns in green then makes seven red blinking then seven red blinking over and over and never turns on the screen. Pls advise.
Hey can any one help me with AS I am new bee, Where to insert/put black wire of multimeter
how to come out printed card of power supply in panasonic lcd/led tv set
Hi there. Please HELP! Our TV is on the fritz and we need some advice before we can move forward! Our TV is a Sylvania (now Funai), model number LC407SS. The TV was turned off and then back on again and from that point, it was dreaded history. Long story, short, the TV will not power on at all, no stand by light, the TV makes sort of a high pitched buzzing noise. No back lights are present, either. We went through a couple of your videos about troubleshooting, but are at a loss on which part to go with first. Your advice would be greatly appreciated. Cheers!
Hi. I have panasoniv 55as650b screen flickers slightly and tv turns off intermittently to a constant blinking red light I have 5 volts but no 16 volts on the main board
i have a 32"sanyo replaced all 3 boards [ from shop jimmy] and the tv does the same thing. comes on long enough to read the input then goes black. any ideas?