PC turns on for 1/2 second then turns off.

Rage91

Reputable
Jun 19, 2015
7
0
4,510
PC turns on for 1/2 second then turns off, with sometimes after a 5 second delay, begins booting up. If not I have to turn off at the mains, leave it for a minute then turn back on and it boots up fine.

This problem started on my original gaming rig, and persists on my new build. If when I shut down my PC after use, and turn the mains off at the wall, when I come back to it in the morning it will boot fine. It seems to happen if I leave the mains on over night. I have tried all different plug sockets in the house with different cords, same result.
Bit of a confusing situation, but I suspect it's the PSU, I don't know if it's something to do with a charge.

First off, I recently bought a GTX 980ti Gigabyte G1gaming for my original rig. Installed it, it was loud and annoying so I returned it.

I placed my r9 290 back into my original rig and it worked fine, without a hitch. Couple of days go by and one morning I go to turn on my PC and the problem I described in the title began to happen.

I used the money I got from the refund to build a new rig as I was planning to.
I built the new rig and the problem is still the same, new components but same problem. Could it be my case? I really am lost here.

Original Rig:

CASE - NZXT H440
CPU - AMD FX-8 8320 Processor
RAM - 8GB 1600Mhz DDR3 Memory (2x4GB)
MB - AMD 970A motherboard
GPU - VaporX Sapphire R9 290
PSU - Novatech 1000 Watt Power Station V2 Black Edition Modular Power Supply 80 PLUS Bronze

New Rig

CASE - NZXT H440
CPU - i7 4970k
RAM - HyperX FURY Series 8GB (2x 4GB) DDR3 1866MHz CL10 DIMM Memory Module Kit
MB - MSI Z97 Gaming 5
GPU - GTX 980 EVGA SC
PSU - Novatech 1000 Watt Power Station V2 Black Edition Modular Power Supply 80 PLUS Bronze
 

Rage91

Reputable
Jun 19, 2015
7
0
4,510

Yeah it could be that, as I dont have another PSU to test it on, just having to buy one....if problem occurs, I'll Return the newest PSU. I'll update you when I have received new PSU, should arrive on Monday
 

Rage91

Reputable
Jun 19, 2015
7
0
4,510
Couple of days with new EVGA Gold 850w psu and I can say it runs smooth, and starts without a hitch...
Although, the psu seems to be making a sound, much like that of a hard drive during operation. It might be a faulty fan bearing so i will leave it for now, if it gets louder or more aggressive I will enter the RMA process.

This is solved for now!