How to Fix TV with Black Screen Problem | LG 43UM6910PUA 

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I'm having same issue. The technician told me i'ld have to buy new screen😢 which is almost the money I bought it . Pls tell me how you fixed yours🙏

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You're welcome! Glad it worked

Hi there, you just have to pry it with a little bit of force. Dont be afraid to apply some force just dont overdo it because you might damage the buffer board

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Im glad it helped. Yes on some TV models we cannot fully restore the picture to perfect condition.

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You are welcome bro. And I'm glad it helped you.

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Thanks Man

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Nope, you cannot just replace the cable because the problem is in the LCD panel itself. What we can do is just block the connection that is going to that defective portion of the LCD panel that is why we cover some pins.

Hello and thank you for your help with this nice video tutorial about problem with LG TV's. But it's possible to open and repair LCD electronic part inside display itself?

Thanks to you

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That slightly dark and a little flashing could happen on some tvs and some model of tvs. Since different tvs have different designs so the pins that are shorted or has the problem has different functions and adjacent pins closest to it. That slight datk and flashing after effects are normal in some situations because we are blocking signals that are supposed to reach the LCD panel. There is 50 to 60 percent chance that everything will work perfect if we block connections going to the panel. Assuming that you covered only the pins that are needed to cover.

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It depends on the tv model. Some could last for a very long time some won't.

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If you still have lots of pins covered by tape it could cause that black vertical strip. Narrow your tape to the minimum. Also it could be a bad COF IC that is causing that problem. It could also be that the vertical strip is the original problem which is a result from either a bad COF or LCD panel and since you covered the connection going to it with tape, now the TV shows picture and at the same time it shows the problem itself.

We cannot just replace the cable because the real problem is in the LCD panel itself. What we can do is just block some connections going to the lcd panel.

Can we replace the power board itself?

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All the best

I hope it helps

If the original problem was the backlight assuming that all other parts are good. And you replaced the backlight strips with new ones. And it did not work after replacing backlights, the problem could be the new installed backlight is defective due to a bad single LED or a broken voltage path.

Hi, I think Your specific problem is different from this. And I cannot recommend anything if I haven't tested the TV myself. This TV I fixed dont show the Logo at all times

Did u ever find the solution because if the lg log pops up for me it’ll work fine sometimes

@@jayredd5614 I cannot really tell what is the problem unless I tested your particular TV. But here are some guesses that could be the culprit; 1. Leaky LCD SCreen/ Buffer Boards 2. Main Board Problem / Solder problem in the BGA ICs. 3. Leaky LED in Backlight Strips 4. PSU Unit 5. Loose Ribbon Cables. So as we can see it is really hard to say what is the problem if the TV is not thoroughly tested.

Yes it matters, The tape must not be very thick like the e-tape. You can use a good quality masking tape on this one. Dont also use a tape that has too much adhesive because it could possibly make some distortions on the video signal.

@@atanbajan Thank you for the info. I'll try it tonight!

Great! Good Luck man

The problem is not on the main board but in the LCD panel itself or the the COF ICs in the buffer board which are technically part of the LCD panel

@@atanbajan Thank you so much for the quick reply and the note about the issue with the LCD Panel. I've also seen people bake the main board in the oven at 385 F for 10 minutes but this is not likely going to fix my issue either. I was hoping that the short would be in the main board. Okay, I will try the taping method. Thank you for posting this video.

@@merlin3921 thank you, I am pertaining to this particular tv model and problem though. Black screen can also be caused by the Main Board but if you follow the process in this video you will have an idea if it is the main board or the panel that has gone bad. Obvious signs of main board problem is that it wont respond to your remote controller and backlight will not turn on when you press the power on button.

@@atanbajan Hi Atan, I just tried disconnecting each ribbon cable and the whole screen is still "black" (dark grey) regardless which one I take out. Should I cover pins on both of them?

@@atanbajan The back light does come on when I push the power button. I don't hear any sound. It's just a blank dark "black" image. So this could be a main board problem?

Im sorry to hear that. We cannot really make it work on some tv models and brands because of so many factors like the design of the circuit and the very electronic component that is causing the problem.

Hi there, Im Sorry I dont accept TVs for repair

I just read this on my 12 years old LG E2441 monitor. Still works perfectly, no problems since I bought it.

Im Sorry to hear that

Yes, Good Idea. Thanks for the thought

You're Welcome. We can just contact in here.

It not work on my lg70 can I buy a new cable ​@atanbajan