Computer shut itself down and won't start back up

[hazeleye]

[COLOR=DarkRed]i was burning a dvd and when i came in to check on it ,the computer had shut down. when i hit the power button nothing happens. I see a green light on the motherboard where the intenet cable is plugged in but thats it . when i hit the reset button on the computer after unplugging and plugging in the psu, the heat sink fan jerks once, then nothing. please help!![/COLOR]
specks
wintergreen systems computer
pm800 m-2 mobo
p-4 3.0ghz processor
western digital 250gb hard drive
western digital 40gb hard drive
ati tv wonder pro
emuzed mauii III
nvidia geforce fx 256mb video card
512mb ram
256mb ram
450watt psu

 

[maXimus4444]

Sounds like a bad psu. A new investment, I suggest.

 

[black9]

Sounds like a bad psu. A new investment, I suggest.

i agree with maximus

 

[hazeleye]

Re; Computer Shut Down And Wont Start

yes it was the psu. i had bought a new psu and that one was dead too so
i took out the psu from my working computer and tested it on the dead one
sure enough it fired right up. so i took it back and bought an antec cool blue fan 480 watts and installed it and now every thing is working again!!
i do have one more question. after about 10 min of computer operation
the fan speed is already at 4500rpm. is this normal? i do have alot of crap
in the pc.
thanks