PC won't POST

[weaksauce]

Hey guys,

I was out of town for 3 days and after getting back home last night my computer would not POST upon powering it up. I usually never shut it down since I'd use it a few hours later - Only leave it on Standby and restart it.

This problem has happened once before but I got my computer to start up again after powering on and off, disconnecting all wires from the back, reconnecting, it mysteriously started up.

Symptons: After I hit the power button, it will just turn on and then off after a few seconds. It keeps rebooting itself in random intervals - as little as 5 seconds to 3 minutes. No beeps at all. There is no display signal going to my monitor. No power going to mouse or keyboard. CPU fan and case fans all have power. Video card fan spins. DVD drive has power.
I have not installed any new hardware recently.

Stats:
Intel E6750 clocked at 3.2ghz
Gigabyte P35C-DS3R (forgot which firmware)
Freezer 7 Pro CPU cooler
2 gb Crucial Ballistix
MSI Geforce 9600GT 512mb
Corsair HX620W PSU
WinXP Pro SP2

Appreciate any help. Let me know if you need more information.
Thanks!

 

[mpilchfamily]

Is all of this with the OC? If so it sounds like its a bit unstable. It could also be a problem with the PSU.

 

[weaksauce]

Originally posted by: mpilchfamily
Is all of this with the OC? If so it sounds like its a bit unstable. It could also be a problem with the PSU.

Yes, with the OC but this build is about 3 years old now. My settings/voltage were tested with Prime.