Can't Start Computer; Doesn't even Bootup., Urgent! Please help!

One of the computers I use, a 3 year old hp is suddenly not turning on. I doesn't even show the boot screen. All it does is beep and beep every 4 or 5 seconds. I have tried to reinstall the XP pro operating system to get the files off the hard drive, but I can't even make the computer reach the boot up screen. Once it made it there, and I put the XP pro cd into the cd drive, and tried to reinstall. It didn't reinstall very far. Within 5 minutes it was not moving and beeping again. I can get onto the internet via my toshiba laptop, but all of my files are on the HP.

Please advise on what to do!!

thanks

Jam it back in, in the dark.

But how is it the power supply? Can someone explain. I mean I see lights on the tower when I press the power switch.

Kalekkan, I will try your suggestiona and turn on the computer with the case off and see if the fan turns on or not. I do have access to another desktop computer beside the laptop.

Would it be a good idea to buy a external case to plug the hard drives into it?

There's nowhere I can't reach.

I have checked out the cpu, and it is spinning. How do I check if the cpu is malfunctioning? Is there a tell tale sign?

This thing is sticky, and I don't like it. I don't appreciate it.

Thanks for the help, I threw the computer in the trash (recovered the files though). And brought a new one. thanks!!

I am a dolphin, do you want me on your body?