Lg plasma 60pa6500-ug damage

[tvtimmy]

Im working on a 2012 lg plasma tv that has 6 blown 30f126 mosfets and one bad rf2001.
I think they failed because the 2 ground/mounting screws in the middle of the zsus board have burned through the board itself. Must have been arcing for a long time!
I checked to see if that part of the board goes to common ground, but it dont.
My question is, can I just get to the bare copper, solder on a piece of wire, and tie it to another ground point. Maybe i can use a ring connector and wire soldered to the pad.
The board is too damaged in those two spots to repair, frickin' charcoal holes twice the size of orig. holes. So..... what do the pros think?

[dick_barton]

Re: Lg plasma 60pa6500-ug damage

A picture of the underside of the board showing the damage could help.

[tvtimmy]

Re: Lg plasma 60pa6500-ug damage

Damage pictures.

[dick_barton]

Re: Lg plasma 60pa6500-ug damage

If you carefully scrape away the solder resist you should be able to solder a very thin washer to the underside to make the connection good. You may have to snip a little bit off one of the washers for the right hand side hole in the photo so it does not short across tracks.

[cliff_hootarski]

Re: Lg plasma 60pa6500-ug damage

You would think that would have put out a "burned" smell to alert the owner something was amiss?

[tvtimmy]

Re: Lg plasma 60pa6500-ug damage

I bought a xsus from ebay and the tv now has a pic, but it looks liks crap.
Malcharge on bottom of screen, sparkles that somewhat go away when lowering vs voltage, and a lot of image retention. I checked the bottom of x and y sus boards, and touched up most of the solder joints. Maybe checking all the voltages will help but I cant find the ve, vsc and the others correct voltages. Maybe someone can help with those, I will get a pic of the sticker later.