My friend's computer wouldn't power on. The fans (and a blue LED near the power switch) come on briefly and then turn off immediately.
I have removed the connections to the drives and the only PCI card, a wireless card. I bought a new power supply and plugged it in, but that didn't change anything.
I am able to turn on the new power supply (or at least its fan) by shorting to ground the green wire in the 24-wire connector that runs from the power supply to the motherboard. This didn't work for the old power supply, so that proves that it was broken.
Is it likely that, when the old power supply died, it ruined something on the motherboard?
- I noticed that the processor fan turns the wrong way, pulling air towards the processor. The plug isn't reversible. Is this a clue?
- The case fan and processor fan also run quite slowly. Is this a clue?
I removed the 2x2 connector that runs from the Power Supply to the motherboard, and NOW THE POWER STAYS ON. Well, the 3 fans stay on, but there is no further sign of life. The motherboard doesn't beep.
At this point, I can't turn the power/fans off using the case's power button (even holding it down), so I use the power supply's power button on the back of the case.
Now that I have isolated which connector is the problem, is there any way to fix it? Might it be that a capacitor near the socket is broken and I could replace it?