Sounds like power supply to me also. Check temps too sometimes overheating
can cause that as well.

"Mark Carey" <Markcarey4@cox.net> wrote in message
news:Hu2pg.52366$ZW3.36860@dukeread04...
My computer suddenly reboots after 3 min. When it reboots it doesn't even
make it through the boot process and boots again. New hard drive but i'm
thinking power supply. Ideas?