Yamaha RX-V457 powers on, Then powers off

Mar 18, 2018
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The issue I'm having is when i turn the unit on it stays on for 5 seconds or so then turns off. I can get into the Speaker menu and it will stay on longer but eventually shuts down. Ive tested all the Speaker connectors for shorts, Ive tried with and without speakers, Ive tested all the FET's. I cant seem to find the issue. I also tested all the Ceramic caps in the PSU. They're all fine. This is confirmed as the unit does power on for a moment. Also when it powers on a relay clicks. The relay clicks again when it shuts down.
 
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