rodifications wrote in message
...

Yamaha model htr 5790 7.1 pro logic surround receiver regardless of
input function or out put channels , produces audio for two to four
seconds then powers off. Press power on with vol. all the way down then
slowly bring up to -30.0 db and it stays on , any more , and it powers
down.




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rodifications


protection circuit genuinly or more likely falsely operating ?, check main
power rails while it is operating and look for a most likely SIL IC