Computer power start up and shut down again

[joesurf1991]

Hello,
my computer starts up and after a few seconds it shuts down, and sometimes it runs but loding the start up takes very long it keeps on loading and loading.

 

[nhasian]

need more background info. is this a new build? or did it just started happening recently? If it just started happening, what changed? Did you add/remove any equipment or software?

 

[tsnor]

Std debugging is to pull parts until the PC posts. When it posts it will beep. Then put parts back in 1 at a time until you isolate the failed part.

start with pulling all external wires including keyboard, mouse, network, video, etc. POST? no - pull all PCI cards. PSOT? no-pull all memory. Etc.

this ref may help http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems