Testing major components.

If your computer can boot from a floppy or CDROM, then there are a series of tests that can be done to find out if your hardware is working properly. If your computer doesn't even turn on proceed to computer check-up.

Diagnostic tools

You can download the tools separately (there's a link on every page) or you can download the Ultimate Boot CD (FREE) where you'll find all the tools necessary conveniently packed in a bootable CD.

memory test hard drive diagnostic motherboard test Power Supply Test with minimum Hardware