pc issue - fried mobo? weak psu?

[roarixer]

hey got an issue, not particularly adept at pcs but ill post what tests ive tried to run

tried to install a wd500gb slave hd yesterday
booted up fine and then about to format at disk management (/w Win7)
as soon as i clicked 'ok' to begin formatting, pc shuts down

i got kind of worried at this stage so i ran a series of tests
computer
can turn on but turns off after 6-7s and no display
the next morning, the computer remains turned on but no display
so i guess the psu is fine, or it is really weak

after i thought maybe my old hd was fried so i plugged the new hd as master drive but same result

i did notice the fan on top of the mobo heatsink was running slow, if not, not running at all so maybe the mobo might be fried?

thanks for your input!
i appreciate it

p.s. i want to add that i tried running without any hd plugged in and same result occured (pc turns on but no display)

 

[iPROTechman]

Cpu could be burned out im guessing due to you saying about the fan.. Could be a bad card/Board, Try the elimination process.

barebone your pc, try 1 stick of ram at a time, in both slots etc. If this doesn't work test your hardware in a test rig or test a new cpu/board in yours.