Computer shuts down completely randomly

KaielSu

Honorable
Jul 2, 2012
6
0
10,510
Specs:

NZXT Phantom ATX Full Tower

Intel Core i5-3570K , no OC

Cooler Master Hyper 212+

MSI GTX 660 TI, no OC

Corsair 750AX PSU

Corsair 2x4GB DDR3 1600

ASRock Z77 Extreme4

Arctic Silver 5 Thermal Paste

Windows 7


 Behaviour:

Completely random powering off. No noticed correlation to time of day or types of programs running. Random duration of working before power off happens: almost immediately to a full day and anything in between. I've noticed that after powering off, pressing the power button connected to the motherboard won't work unless the power switch on the PSU is switched to O, and a few minutes pass. Then, after the power switch is back to I, either powering on will work, or the power button will click, and the lights and fans will briefly start, then abruptly turn off as it all shuts down and a second clicking noise is heard. Note: the first click happens whether the computer shuts down or not.


This started happening right as I moved after a 2000km road trip with the computer on the car floor. It was reasonably well secured and I don't remember it ever falling over. Prior to the trip, however, it was completely fine.


HWMonitor shows all temps and voltages normal. Don't have any spare memory sticks or PSU or motherboard. Worst comes to worst I'll take it along for a visit to a repair shop.


Thanks for any help.