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You may have a stuck power relay. If so, the power may be on all the time, but audio and video muted by system control. BUT, you said there was no HV, and that sort of kills my idea. I figured I'd throw it out there anyway just for something to think about.
Try this....put an AC ammeter in series with one side of the power cord and see if it is pulling any juice. An easy way to do that is to pop the fuse out of the set and clip the ammeter to the fuse clips.
Another idea: Do you have a cat? Cats are warm and I understand they like to sleep on top of stuff like a TV
EDIT: I just looked at the picture again, and see that it looks like a non-remote set. Probably no relay, but the on/off switch may be stuck on
Last edited by Geoff Bourquin; 10-25-2012 at 11:08 PM.
Reason: I started thinking
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