Motherboard fried? I tried to turn on my computer and it would not come on. Initially the green light came on when I tried to turn it on, but it would not boot up. I tried to reset power and now it will do nothing. I opened it up to see what was going on and I cannot find anything obvious. When I pushed the power button the fans will act as if they want to spin, but they won't. I attempted to check the power supply and found that when I disconnect one of the connectors from the motherboard I can get the fans to come on, but the computer still does not appear to come on. The connector looks like it says PWR2 and it is a small 4-pin connector in the middle of the board. Does anyone have any ideas. It is about 2-3 years old. Please help!

I have the exact same problem. I did notice if i try to power up after removing the 4 pin auxiliary power connector the system will initially try to power up but shuts down completely after about 10 seconds. I have the exact same problem. I did notice if i try to power up after removing the 4 pin auxiliary power connector the system will initially try to power up but shuts down completely after about 10 seconds.

Schmolly,

In these case like this were a board does not boot it's usually a failure in one of the components or a connector as worked it's self loose.

First I'd try re-seating all the connectors and and bus cards (graphics cards etc). Then is this fails to solve your problem then I'm certain one of your componets or bus cards have failed.

Possibilities are...
1) Processor may have failed.
2) Processor fan and heat sink has become clogged your processor has slowly cooked.
3) Your power supply has become faulty and the "power good signal" is no longer seen by the supplies logic controls, preventing it from supplying power to the motherboard.
4) Capacitor(s) or inductor(s), resistors(s) or diode(s) on your motherboard have failed creating an open or short circuit. This prevents the correct logic level being generated for the PSU power good signal. Hence system will not start.
5) A fault has developed on one of your bus cards, and this prevent the system from starting.
6) Dust/Dirt has accumulated in your bus, processor or memory connectors and this prevents the proper electrical connections from being made. Hence, the system will not boot.
7) Dust/Dirt build up in your power supply has caused it fail.
8) DVD/CD or hard drive has become faulty and prevent the system from booting.

Try looking at the capacitors on the motherboard, see this page for advice on spotting bad ones and how to replace them (at your own risk).

The best thing to do...unplug all your hard drives, system boards and unnecessary connectors just to see if the system will boot.

You only need to leave the processor, memory, power and front panel connectors (for the power switch only) plugged into the motherboard. If it starts and stays on then the power supply , processor motherboard and most likely the memory are okay.

That's about as much help as I can give without further feedback.

Don't forget to rate this solution and comment on it's quality. Thank you.

Spare head 2.

Schmolly,

In these case like this were a board does not boot it's usually a failure in one of the components or a connector as worked it's self loose.

First I'd try re-seating all the connectors and and bus cards (graphics cards etc). Then is this fails to solve your problem then I'm certain one of your componets or bus cards have failed.

Possibilities are...
1) Processor may have failed.
2) Processor fan and heat sink has become clogged your processor has slowly cooked.
3) Your power supply has become faulty and the "power good signal" is no longer seen by the supplies logic controls, preventing it from supplying power to the motherboard.
4) Capacitor(s) or inductor(s), resistors(s) or diode(s) on your motherboard have failed creating an open or short circuit. This prevents the correct logic level being generated for the PSU power good signal. Hence system will not start.
5) A fault has developed on one of your bus cards, and this prevent the system from starting.
6) Dust/Dirt has accumulated in your bus, processor or memory connectors and this prevents the proper electrical connections from being made. Hence, the system will not boot.
7) Dust/Dirt build up in your power supply has caused it fail.
8) DVD/CD or hard drive has become faulty and prevent the system from booting.

Try looking at the capacitors on the motherboard, see this page for advice on spotting bad ones and how to replace them (at your own risk).

The best thing to do...unplug all your hard drives, system boards and unnecessary connectors just to see if the system will boot.

You only need to leave the processor, memory, power and front panel connectors (for the power switch only) plugged into the motherboard. If it starts and stays on then the power supply , processor motherboard and most likely the memory are okay.

That's about as much help as I can give without further feedback.

Don't forget to rate this solution and comment on it's quality. Thank you.

Spare head 2.