Shutting off??

My computer recently started turning off 3 seconds after i power it up. This started after i tried to instal and internal modem. At first i thought it was the grachics card but i tried 2 different ones and no dice. then i just plugged it in to the motherboard instead. Then i changed power supplies, still the same ressults. It is an msi motherboard and it has an intell p4 2.66 in it. Any ideas?

 

did u try taking the modem out?

 

yup, took the modem out, unplugged all the extra fans. basically everything that is extra i unplugged. but it doesn't even go to the boot screen, it doesn't beep or anything ting just start for 3 seconds and then goes off.

 

There is a short somewhere.

 

a short on the motherboard? what do you mean? metal touching metal or what? is it ruinned?

 

Try pulling the box apart & check for dirt. Mine done the same thing. It was nasty, I blew it out & it's been fine ever since.