Onkyo Amplifier Model A-SV 210 no power

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Joined Jun 20, 2020
I have a Onkyo amplifier model: S-SV 210 when plugged in the stand by 12v power is there but pressing the power switch does nothing.
I took some voltage reading on the logic board and 5v is present at the power button and at the controler IC. anyone has any idea on what i might be missing here as im thinking the controler chip is bad. a schematic would be apprecitated as well if anybody has one... thanks