I was troubleshooting my Asus A8V motherboard (Socket 939). Finally got everything working except the board would start up as soon as the power switch on the PSU was turned on ie without pushing the motherboard power button. The Onboard sound was crackly so I tried a PCI-slot sound card. This didn't work at all and when I moved it to the lowest PCI slot the board would not boot. I swapped the PSU out and everything worked
fine with the replacement PSU, even though it had less power on the 12V rail.
I took the cover off, no obvious faults. I took time to read the PSU faqs. What I understand is that something in the 5V standby circuit is detecting ground, as if I had pushed the power button. At the same time I am losing power somewhere. With the good PSU all the PCI slots work properly.
Any hints on where to start and where on the PCB to look? I have had a rash of PSU failures of late and would like to start with this one to get some experience before tackling the others.
fine with the replacement PSU, even though it had less power on the 12V rail.
I took the cover off, no obvious faults. I took time to read the PSU faqs. What I understand is that something in the 5V standby circuit is detecting ground, as if I had pushed the power button. At the same time I am losing power somewhere. With the good PSU all the PCI slots work properly.
Any hints on where to start and where on the PCB to look? I have had a rash of PSU failures of late and would like to start with this one to get some experience before tackling the others.
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