I've suffered a total pc failure - I'm sending this from my sister's pc, but I
don't know when I'll next have internet access.

There was a long beep then the screen went blank. It won't restart from the
hard drive or from a floppy. The power light on the tower comes on, and the
hard drive light stays full on, but nothing happens. It's a Tiny pc, about 7 years old, and running Win XP.

If anyone's got any suggestions as to the cause I'd be very grateful...!

Edit: sorry about the strange line spacing - I copied and pasted from elsewhere.