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Post: Rispondi a "LG TV - powers on, but black screen after LG...
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Votanti: mayer (Admin Ha Deciso)

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Domanda

LG TV - powers on, but black screen after LG logo, backlight is on

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Hi guys,

A few days ago my TV screen suddenly went black and I don't quite know what to do.

Basically, if I turn it on the LG logo will appear for about a second or so and then the screen goes black. although backlight stays on. The only button on the remote that does anything is the on/off one.

Called up 2 tv repair shops and both told me almost straight away that it sounds like the panel is dead and I need to basically replace the whole screen (a $3,000 repair), which I don't quite believe.

When I took the TV off the wall and tried turning it on again a few days later - it worked fine for maybe 10 seconds and then the screen went black again.

Maybe there is a loose connection somewhere or something.

Any ideas? I hope there's something I could try before I throw it away.

The model is LG 70" UH635T, I could find it in the list so had to choose a random LG model when posting this question

Thanks!


Risposta

@crashxxx backlight on without video is usually a main board problem you did not tell us if you get any sound. You need to check out all your video inputs and see if that changes anything. If it does not remove the back of the beast and take a look at all the boards for any obvious damage (leaking or domed looking caps etc.). Post pictures of your boards so we can see what you see. Use this guide Aggiungere immagini ad una domanda for that. The problem could be the panel but it could also be the power board or the main board.