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Thanks radiotvnut. The area around the resistor wasn't just kinda brown from running hot all these years, it was burnt and there was black stuff on top of the pcb and the foil side of the PCB was warped. I actually lifted a trail when I tried putting the resistor back in. The resistor leads to the middle pin of a 3-pin transistor, so I hooked it up to there with a wire. No change.
The problem was incorrectly described to me (I don't watch much TV in the living room), the right channel is good for about 30-40 seconds if you turn the TV on cold, then it starts popping in and out until it drops out completely, and sometimes it comes back but usually doesn't. If you turn off the TV, let it sit for a few seconds, then turn it back on, the sound on the right channel comes back for a few seconds before dropping out again.
I resoldered the RCA audio-out connector pins, no change there either.
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