Plasma TV power cycles constantly

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I have an LG 42PC1DA plasma TV and while watching it, it will turn off than back on. Sometimes it will go for half-an-hour working fine, other times it'll power cycle after 5 minutes. Another site suggested changing the surge protector, I tried plugging it directly into the wall and it still has the problem. The TV is out of warranty, so I'm wondering if anybody knows what's wrong with it or how to fix it. I've seen a lot of people on other sites have this problem with LG TV's, but none of them suggest a solution. I'd like to know if the problem can be fixed by replacing a fuse or changing a circuit board.

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