io wrote:

Hi all.

I have a problem on a Yamaha AX-496 amplifier.
When I press the POWER ON button, it will turn on but only for 3-4 seconds.
I already checked the fuses and all the voltages +/-55 +/-12 +/-5 V are OK
what can I do?

thanks.

Frank


I assume it may have a relay in the PS to prevent DC rush to the speakers.
check that relay and make sure it is staying on.