LG 42PT350-UD .AUSLLHR Plasma - Dead

[kevinm34232]

This TV was dead, I started by replacing power supply and it was still dead.

If I unplug the main board from the new PS board though, the TV clicked and started to come on, then shut down.

I found 2 shorted transistors (30F124) on ZSUS board, I ordered and replaced. When I started it back up I heard a pop shortly after and those 2 are shorted again.

I didn't have the ZSUS screwed down and wondering if while moving it to see if I was getting a pic because I thought I saw the screen glow, may have caused them to blow from losing the ground connection, or if there is another problem. The PS board needed to be screwed down to chassis for it to work also.

Also the TV will not even try to turn on unless I have the main board disconnected from the PS board, is the main board bad too? Thanks!

[chaplu]

Re: LG 42PT350-UD .AUSLLHR Plasma - Dead

This TV was dead, I started by replacing power supply and it was still dead.

If I unplug the main board from the new PS board though, the TV clicked and started to come on, then shut down.

I found 2 shorted transistors (30F124) on ZSUS board, I ordered and replaced. When I started it back up I heard a pop shortly after and those 2 are shorted again.

I didn't have the ZSUS screwed down and wondering if while moving it to see if I was getting a pic because I thought I saw the screen glow, may have caused them to blow from losing the ground connection, or if there is another problem. The PS board needed to be screwed down to chassis for it to work also.

Also the TV will not even try to turn on unless I have the main board disconnected from the PS board, is the main board bad too? Thanks!

hello kevin did you find any solution to it? it seems zsus on my tv having same issue as well i can see two 30f124 but can't tell if they are bad. since there's no physical damage. Any help would be appreciated.

Thanks