PSU Failure?

[Un4g1v3n]

Ok.

I plug in the power cord, and pressed the power button, and nothing happened. So, I took the computer apart to see what could be wrong.
It looked like everything was ok.

So I plug the cord back in, and I hear a high pitched noise. It doesnt stop until I unplug the cord. I was wondering if power was even getting to the motherboard, so I hooked up an LED. I plugged the cord in (again) and the LED lit up, signifying that yes, there's power going through the board.

What I don't understand, is why the damn thing won't start. There's power going from the PSU to the motherboard, but it won't start. It was working yesterday, so I know the voltage is about adequate.

No new hardware has been added, or taken off.

What gets me is that the PSU makes a high pitched noise. I've never heard it do that before.

Any answers? All the help is appriciated.

[Cactus]

Certainly sounds like the PSU...
Do have another PSU you can try?
If not you can unplug everything from MO,then plug in the power
supply.

Now use a volt meter to see what the PSU is spitting out.
Obviously the needle will move but if its cooked...just a little.


PS: just stick the probes from the meter into each plug making sure you
get it in each hole in the plug as one in each is a ground so there will be no reading.

[Un4g1v3n]

Sure wish I had a voltmeter. Ill borrow one from school.