|One of my relatives gave me their computer with the description that it was not turning on. It is an HP Pavilion s3200n slimline. I noted the problem and tried the following.|
First I took the case apart and verified with my multimeter that the power switch was working properly. It was: the switch press can be detected at the front panel connector.
Next I took out the power supply. Making sure to short the PS_ON and a ground pin, I verified that all voltages were correct at the ATX connector. The appropriate pins were reading 3.3, 5 and 12 volts. The power supply fan also turns on.
However, when I connect the power supply to the motherboard and press the on switch, the power supply does not turn on. The fan does not move and there is no voltage on the other ATX pins. The same happens if I just short the power pins on the front panel connector with a screwdriver.
Note that I cannot test a different power supply on this computer since it uses a smaller ATX connector (still 24 pin, only the pins are smaller) than the power supply in my own computer.
The motherboard is an Asus M2N61-AR, which appears to be custom made for HP. Is there any way to test the motherboard itself? I have looked closely at it and do not see anything burnt out or any leaking capacitors.