lg Plasma model 42pc3d picture problem

[Sevenqi]

lg 42pc3d plasma, when the background has not much white color, the picture is normal as photo 1, but when the picture has more white color, the screen is flashing/flickering, picture is distored as photo 2 shows.
Not sure if this is the power supply or y board issues. If power supply, does it mean white screen needs more energy but power board can't supply? or y board is bad in some level?

[crd1584]

Re: lg Plasma model 42pc3d picture problem

I am having the same problem with my Zenith (LG) Z60PV220. The picture just started doing the same thing yesterday. Need help solving the issue. I have some skills, but am far from an expert.

[capkid]

Re: lg Plasma model 42pc3d picture problem

(1) Check your output voltages from the PSU to the sustains, namely VS and VA.
(2) Check VSC and -Vy on the Y-Sustain.
(3) Check Vzb on the Z-Sustain.

Most likely, you have a bad Y-Sustain. The IPM under the large heat sink may be faulty. Let me know if you need help taking voltage measurements.

[crd1584]

Re: lg Plasma model 42pc3d picture problem

Thank u for the reply on this. Got a video to test the VS and VA, seems simple enough with everything labeled. I cannot get to this until this Sunday due to work, but plan on doing it then. The picture seems to progressively get worse day by day. If this is the y-sustain, could it cause more damage if left untouched for awhile?

[capkid]

Re: lg Plasma model 42pc3d picture problem

Sustain failures in this LG plasma are normally self-contained.