Samsung TV Powers On With Back Lights But No Picture Potential FIXES or BAD PANEL

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In this video I show you potential fixes for your Samsung TV that powers up and turns on with back lights but has no picture. I would start with replacing the Tcon board and if that doesn't fix it then replace the main board if that still doesn't fix it then it is a bad panel which is not fixable.

DISCLAIMER: This video and description contains affiliate links, which means that if you click on one of the product links, we’ll receive a small commission.

#SamsungTV #SamsungTVfix #TVfix #TipsNNtricks

[Riko]

It’s not bad panel, it’s the led driver one of the ribbons is bad. On the left ribbon coming from the tcon, put a little masking tape covering about ten pins, and so on. This disables any of the connectors in the bad side of panel because these work paralel so you’re basically skipping one and the tv will be back working 100%

[pontiacsrule]

Great video. I had no backlights or video but sound. Had 25/60 backlights burnt out. Changed backlights & now backlights work, but still no video. It's a 50" Samsung also. So I'm also wrestling on what to do. Thanks for the tidbit on removing 1 side of panel by removing cable. Never thought of that. Thanks again

[hassegreiner]

I wish I'd seen this before I bought a pre-owned main board - but I like the approach to isolate the panel sections.

[FrugalRepair]

Good job disconnecting the one side of the tv as part of the diagnosis. There are two more things you can try. Did you ensure the problem wasn’t one of the tab bonds lifting on the buffer board? Also, on the buffer board, you can check for shorts. Maybe there is a shorted cap?

[LittleBeeBecca]

I seem to have a similar problem. Thank you for the video

[MVM]

@TipsNNTricks the problem is on the boards that are directly connected to the t con board, these boards are connected to the screen the fault is simple and easy to repair you just need to replace smd capacitors

[davidanthrope]

Nice video - and unlike pretty much every other video you actually cover the whole process and LOGIC of why it would be a certain component and how to determine it with certainty. THANK YOU. I replaced my t-con and main board in a Samsung UN43 - I had power, backlights, sound but no picture. Replaced the boards, had the same damn thing. It's not my tv, it's a friends, so not the same hdmi cable or video source. Screen does light up at -2- levels of intensity, but only backlighting. Menu/source buttons result in no change. I messed with it every which way for an hour. Then friend said she used a firestick, so for the f*ck of it I plugged in a blank USB stick. Bam. Power on and see SMART-TV logo. WTF? I swear this is exact in every detail (as a software engineer I do not miss the details LOL I also do not understand why being a software engineer makes my friends think I can repair TVs or cell phones LOL).

Can you offer any insight as to WHY and HOW the usb stick would cause the damn tv to start working? After that, Directv works fine, video, sound menus etc..

[Sloxx]

This is most likely a faulty or shorted address or clock line in the lcd panel. A short in these signal lines of the panel will drag the voltage down on the TCON ASIC forcing it to shut down. Since these signals are redundant and get driven from both sides, you can block one completely and the other will still drive the panel just fine. The are various ways to repair this, but much of the time people have been using scotch tape but if you have an oscilloscope, you can narrow it down without guessing. FrugalRepair has a good video on the tape method.

[dp]

There is a fix, as explained by others. Putting scotch tape over the bad pins. Look up "how to fix tv with tape"
(Mentioning this again, so others see the solution in comment section)

But I am commenting to just say, Thank you so much for creating this video. You don't realize what you did for my family. We all rely on our TV after long day of work to entertain ourselves. Your diagnostic methodology is truely commendable. We appreciate you documenting this well. ❤️ #You a real my dude

[sonofgodjesuschrist]

THANK YOU FOR ALL THE TIME AND EFFORT I BOUGHT A BRAND NEW 📺 TV 😃

[langzone]

Thanks man! Exactly the same issue with a LG 64 inch TV. Came to the conclusion to scrap the panel as well. Hopefully can flip the main board and TCon online

[mamadoukamate]

You are so good when you explain stuffs. Very easy to understand and follow.

[skytechbits]

Thanks for this great video. I am a computer technician and my UN32N5300AF as it shows in the model as a 32 inch. This video cam out before the pandemic so right now prices are higher, however I don't believe in throwing electronic items in the landfills at all. My backlights do work and after reseating the cables which should always be done first, I will check those lower cables one at a time next since that brought up half your screen. Great tip there. Thanks for the information.

[BrandonElliotSmith]

@TipsNNTricks So I’m assuming (& PRAYING) that it’s simply a bad T-con board rather than a bad panel if you get backlights but no picture whatsoever (regardless of how you connect one or BOTH t-con>panel ribbons)??? That’s what I’m dealing with, in addition to constant restarts once I try to turn it on. Replaced a puffy cap on the power board & the problem continued. Then replaced the main board & it still does the same thing. T-con board arrives this week & I’m praying that fixes it because this TV was a dumpster find & legit LOOKS brand new. I looked for burnt sections on the power board & saw none, plus all voltages on the power board checked out ok, so just a bit stumped here (especially with the restarts). One thing I’ll also mention is that the T-con board does not have ANY leds lighting up & I’m not sure if my particular model simply doesn’t have any installed by design or if leds ARE installed but simply not lighting lol. Mine is a Samsung UN46D6420UFXZA

[gerardosantos]

you did a great job i had trouble with a lg with the same problem and you gave me the answer thank you happy thanks givivg

[Swenser]

Did you try masking a few pins on the tcon2lcd right side connector only.

[ChubbsX]

I have this same exact TV and i also had no luck with replacing the TCON board. I loved this TV....RIP 😔

[azurplex]

Did you check the ribbon cables themselves? What about the solder joints on the connectors? It looks like a simple connection fault rather than bad boards.

[ralphgore]

Hello Chris, thanks for the video. I have a similar problem with dead black screen. Not sure what might be a real problem inside the TV. If the LED light is off, how to fix it?

[macleanmendoza]

i had a problem with my kdl-60nx810 sony I couldnt determine weather the tcon or the mainboard is the problem. i tried removing the cable that goes to the mainboard and the tcon still has the supply then I turned it on, then the screen turns to like color mode testing which displays color such as red green blue and gray and some shadowing. now I'm confused which one to change the mainboard or the tcon.