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Hi all, I have an LG 42PC5D that will power on for 3 to 4 minutes and seem to work fine but then goes to a black screen and wont turn back on once I turn it off unless I unplug it and let it sit. The sound still works once the screen goes black but again, if I turn it off after this happens, it won't turn back on.. Any ideas out there?

This sounds like the lamp has reached the end of its lifetime or if you just replaced it, maybe the ballast...

I didn't even know plasmas had lamps and ballasts! thanks :)