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backlight problems dark shades

  • At first my tv was just left with a black screen plus sound, but pic came up after 10 min, but a dark shade on the upper side.

Then after a few days the same thing happened, I just hit the tv on a few places and boom the pic came back! now the upper side got perfect light but its shady on the down side.

Thought a back light was broken but it can’t be as it changes place . what would be reason?

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@oldturkey03 just to let you know and maybe you got a answer, it’s back working normal again I hit on the screen at the button after putting it back together, and it seems good, but it was shady for a long time before that, so what would that be and can I change something to make it last. Thanks again you been a great help!

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@anna3 corroded cable or cold solder joint. It might help if you post some good pictures of what your screen shows as well as your boards etc. with the back cover removed. Attach those to your QUESTION. You also need to let us know what exact model your TV is. Adding images to an existing question

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@oldturkey03 thank you so much for answering, I hope you can see the pictures, thought I have nothing to lose to try.. thank you again!

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@anna3 sorry no pictures. try again and remember that you can only add pictures to your QUESTION.

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@oldturkey03 I got pictures now but don’t know if it’s any help lol

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@anna3 if it keeps working then leave it alone. Ultimately it does sound and look like it origins at the power board level. Looks like your board is a BN44-00859A and I would probe around the LED connector CNI802. The fuse on your board (FM891S) looks slightly discolored on your pictures. Post a close up of it and the resistors (R9167 and R9169 area )around the LED connector so we can verify and further check.

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ac.bjork will be eternally grateful.
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