LG 52LG50 will not turn off

[moegilla]

Hey guys,
I have a 52 inch LG , model 52LG50 that does not want to stay off. As soon as I plug in AC it turns on. If I attempt to turn it off either by remote or by pressing the button on the TV, it turns off, then immediately back on. I have replaced the small black board seen in the photos that houses the power button. I do not see any blown caps. I've taken a look at the system board and can see no obvious problems.

Ideas?
Thanks a ton.

[tom66]

Re: LG 52LG50 will not turn off

Can you try without that connector going to the button board? I know you replaced the board, but if it's a capacitive sense board (touch sensitive) something contaminated in there (flake of metal or so on) could be triggering it.

[moegilla]

Re: LG 52LG50 will not turn off

Ill give it a try right now

[moegilla]

Re: LG 52LG50 will not turn off

sooooooooooooo that seems to have worked....its staying off....wtf ?!?!

[moegilla]

Re: LG 52LG50 will not turn off

well I reconnected that harness after the tv stayed off and now it is still staying off...previously I had removed the main board and scratched off some random dried board goo(technical term) so not sure what did it, but the TV stays off now.

[tom66]

Re: LG 52LG50 will not turn off

I suspect you've moved the board slightly when you did that so it's not picking up erroneous button presses. See if it comes back. If not, enjoy your TV, otherwise take the board out and clean it and the casing in front of it.

[densmith123]

Re: LG 52LG50 will not turn off

I had this problem and successfully repaired it on a friend's TV. Please see my writeup at:

https://www.badcaps.net/forum/showth...925#post775925