LG 42PQ2000 Relay clicking

[mgibson212]

Chaps,
I have a LG 42PQ2000 Plasma, power up and the relay starts to click, red standby light flickering on and off.

Opened the baby up and disconnected the sus boards, problem still there.

All caps look fine.

Measured the 5v supply voltage at the micro and it varies, think this is the problem no 5v standby. Any idea for a schematic or components to check.

Thanks in advance

[vinceroger69]

Re: LG 42PQ2000 Relay clicking

What is the power supply number?

[selldoor]

Re: LG 42PQ2000 Relay clicking

I am not going to encourage your laziness I googled for the schematic and found a free one in approx 30 seconds

[mgibson212]

Re: LG 42PQ2000 Relay clicking

Pspu-j902a
eay60696801

[mgibson212]

Re: LG 42PQ2000 Relay clicking

Any Idea on which components to test ?

[vinceroger69]

Re: LG 42PQ2000 Relay clicking

Have you downloaded the schematic and checked the various stages to see what board maybe at fault?

[Mikeyboy2007]

Re: LG 42PQ2000 Relay clicking

just came across this could be wrong but this could be same issue ?? i would test that diode as mentioned in this thread !
https://www.badcaps.net/forum/showthread.php?t=49482