LG 52LG60 LCD screen full of lines or dots repair

[Sevenqi]

This problem is the EAX47224002 FRC Board, some caps leaking.
I replaced 4 caps c204,210,277,275 fixed.

[budm]

Re: LG 52LG60 LCD screen full of lines or dots repair

Thanks for the tips.
Do you have the screen shots of what the bad video looks like?

[Sevenqi]

Re: LG 52LG60 LCD screen full of lines or dots repair

I didn't capture the screenshots, but I got 2 TVS same model same issues, I believe this is the common problem.
I had no idea which capacitor, use heat gun to blew the caps picture came to normal, but after a while problem came back.

Some one posted a video in youtube, mine is even worse then hos:

https://www.youtube.com/watch?v=_IBXpivEZWk

[budm]

Re: LG 52LG60 LCD screen full of lines or dots repair

You did replace those caps with low ESR type, correct?

[Sevenqi]

Re: LG 52LG60 LCD screen full of lines or dots repair

I didn't use ESR tester, 4 of them are suspected and replaced them.

[budm]

Re: LG 52LG60 LCD screen full of lines or dots repair

When you heat up the caps, the ESR will go down so the circuit will function again, when ESR goes up then the circuit become unstable. It may work for now using general purpose caps but I would replace them with low ESR type.