LG42PC1D maldischarge

[PowerAmpFreak]

Hello. Nice to have the forum back!
Anyway, got a standard IPM failure on Y-SUS board. Had another working board, trimmed the voltages exactly according to panel spec.
But, I can't get rid of the sparkles. It's quite excessive over entire screen.
Even tried to adjust Setdown and Setup pots, which made a little good, but far away from acceptable screen.
This kind of problem can't be elsewhere than Y-SUS right?
How to get rid of the sparkles?

[tom66]

Re: LG42PC1D maldischarge

Firmware upgrade of the control board (not the main board) is required. A user on these forums does it for a small fee, however results aren't guaranteed.

[PowerAmpFreak]

Re: LG42PC1D maldischarge

Even if the Y-SUS boards are identical and uses exact same IPM?

[tom66]

Re: LG42PC1D maldischarge

Even if the Y-SUS boards are identical and uses exact same IPM?

It's due to panel aging. Adjustments can only fix it slightly.

[PowerAmpFreak]

Re: LG42PC1D maldischarge

But the sparkles were not present hours before the IPM failure. What is the main reason for the sparkles?

[tom66]

Re: LG42PC1D maldischarge

But the sparkles were not present hours before the IPM failure. What is the main reason for the sparkles?

Inability for the PDP drive to clear the wall charge built up by previous images, due to panel aging. That's why they typically follow motion.

[PowerAmpFreak]

Re: LG42PC1D maldischarge

I had another logic board with same partnumber, except for rev.C instead of rev.B of original board. I was hoping LG may had an upgraded firmware in that board, eventually solving the "sparkling" issue, but it didn't do any difference at all.
I think this will be it with this set - get ready for scrapping!

[tom66]

Re: LG42PC1D maldischarge

Sell it on eBay. Some technicians have the kit to repair them.

I've made a note not to collect any older LG plasmas. Too difficult to fix the maldischarge, and they all have it.