I have a LG 60pv250, picture look good except for some what looks like noise that flashes on and off in certain areas across the screen. Grainy pic splotches. Looks like it would be an area across the screen horizontally. Also the tv stays on for probably 2-3 mins and then turns itself off. I can turn it back on but cycle continues. If I unplug the YSUS board the tv will stay on forever but no picture of course but have audio. Would this point to a bad YSUS board? I have already touched up the bad solder joints on the coils on this board as its a known issue. If it is a bad YSUS board do I have to replace the 2 buffer boards? I have seen opinions both ways. I have measured the voltages going to the YSUS and TSUS boards and both are identical coming from the power supply. Any help would be appreciated.
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Re: LG 60pv250 plasma tv issue
Y-sustain, Z-sustain, and power supply commonly have cracked solder joints on these models.
I recommend you thoroughly reflow all 3 boards. If the issue doesn't get resolved, then you missed the cracked joints. there can be many dozens of cracked joints, sometimes hundreds. It will take a while to properly reflow all three boards but it will take care of the problem.
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