BleepingComputer.com: Computer won't turn on

My computer suddenly turned off while I was using it, and now it won't turn back on.
I have checked and made sure that all the power plugs are tightly plugged in, and that the power is on.
When I press the power on button, the fan in the back of the power supply on, as does the fan on the processor. No lights (neither green nor red) adjacent to the power switch go on.
I have tried switching to another hard drive, as I have a spare one sitting inside the machine, but it didn't help.
My computer is a 4-year-old custom-built one. I'm not sure if the problem is with the motherboard (I have read that resetting it might help, but 1) I have no idea how to re-set it (my MB is Fujitsu Siemens D1675), and 2) if the processor fan powers on, does that mean the MB is ok?)
Help, please?

This post has been edited by irrumator11: 25 October 2008 - 09:19 AM

Do you hear any post beeps?

Quote

Take the motherboard battery out for 15 minutes.

If the power supply is indeed OK, remove the CPU from the motherboard. Plug the computer back in, without the CPU installed, and turn it on. If all of the fans spin up and continue to run, It's the CPU

This post has been edited by garmanma: 25 October 2008 - 09:23 AM

So I'm assuming the MB battery is the round thing labeled as #8 in the diagram, right? (I've attached a photo of my MB + diagram).

Also, I do not hear any beeps at all.

And, how do I go about removing the processor?

This post has been edited by irrumator11: 25 October 2008 - 09:23 AM

To remove the processor you need to unlock the CPU heatsink/fan, depending on your socket type there will be a clip or some latches. then you see the CPU socket, in the socket somewhere you should see a little lever, pull that lever up and then you can pull out the cpu. and that's it

Sorry I wasn't more specific. I just assumed when you said custom made that you were the one who put it together.

Plenty of guides available, http://www.google.com/search?hl=en&q=i...mp;aq=f&oq=

Taking one out is just the reverse of installing one .

Louis

Thanks, guys - it was the power supply. I replaced it, and now the computer is running fine