Also open the lid and check the capacitors on the mainboard, if the tops loog bulged, cracked, or popped open, they need replacing. This is getting more & more common now that computers are staying on for longer periods. I have replaced many a popped cap, this mainboard I on now has been fixed 5 times. The symptoms are random crashes, lockups, and file corruption. It is usually the 2200s or 3300s around the CPU. Regards, Kev :) Find local movie times and trailers on Yahoo! Movies. http://au.movies.yahoo.com