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does the repair manual have an electrical diagram? that has a feed back style power supply, you may just have an optoisolator out. that would tell your power supply not to power your sound board.
I know how dang frustrating it is to pay $600+ for a tv and then have it crap the bed.
remember any little hole in the top of the caps, or anything leaking out, it could even look like the dielectric glue stuff, and that cap is not gonna perform to spec.
half a volt drop in the output to your sound board will make the feedback loop shut down.
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Scratch' ,I'm going to end this TV repair discussion on this thread. I'll post a new thread in "Personal Projects (no welder required)", titled "Plasma TV fix". This can continue there if you want.
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Hah, thats quoted from my receiver project thread. From what I understood its not that common, sure was scarey when it was happening though.
