Computer Won't Turn On!

[Heirarchy]

Hello. Yesterday, while playing a game on the computer, my computer crashed. This happens once in a while so I wasn't worried. This time it was different. My computer crashed to a black screen, then the button on the CD drive started flashing and the drive made noises. After all that happened, the computer shut off. I tried to turn it back on, and nothing happened.
I tried to see what the problem was. I checked the power cord on another computer and it works. I tried to plug the computer into a different outlet, that didn't work. I looked inside and checked all the cables/parts to see if any were unattached, they were fine.
I'm not sure why it happened (Friday the 13th...) or what to do. My computer has lots of important things on it and it is vital for my job. If anyone has any suggestions on what to do, I'm all ears.

Heirarchy

[arf-arf]

maybe you caught a virus.

did you try running your antivirus emergency bootup cd?

could be a hard drive failure too. next time, use an image backup solution on an external hard drive - software like acronis true image and norton ghost are good at facilitating this.


arf

[Miz]

If "nothing happened" means no lights came on and no fans started turning, the most likely cause is the power supply unit went bad. They cannot be repaired so it'll have to be replaced.