wierd problem

[deta]

Hey guys im getting a really wierd problem
my pc automatically shuts down after 15 sec from booting. or when it is in idle
the wierd part is, if i open a game like san andreas or nfs it doesnt shut down even if i play fir 2 hrs

Any idea ??

My config is
pentium e2180
Ms 7525 mobo
1gb ram
a local 430 watt psu

 

[ArjunKiller]

Check for loose connections in the power cord and the 24 pin ATX connector to the motherboard.

 

[Tenida]

Check the cpu temperature using realtemp.And post. the screenshot here.Also clean the ram slot.

 

[coderunknown]

reset bios and try again. looks like bios problem.