PC automatically shuts down. Fans/LEDs spin for a second on Reboot Attempt

Ovdessel

Reputable
Jul 29, 2015
5
0
4,520
Recently built my first PC this past weekend and it was running great (able to instal windows, all my software, gaming, normal usage etc) until yesterday while doing CAD (Inventor Autodesk) for ~4 hours my computer shut itself down: no BSOD just completely off.

I tried to turn my computer on, but all that would happen when I pressed the power button was that the fans and LEDs would turn on for a second and then immediately turn off.

I had a similar problem before this so I opened my computer and did the following:

    1) Reseated all power connectors
    2) Reseated my GPU (R9280x)
    3) Reseated my Ram (8Gb)
    4) Reset BIOS (took coin cell out)
    5) Reseated my CPU and reinstalled my CPU cooler (CM 212 evo) (Note: there were no bent pins)


Before and after each step I attempted to boot with no luck, until it just happened to work.

Fast forward to yesterday and I had the same problem so I'm thinking it might not actually be an issue with all the components listed above. Any suggestions??

Idle CPU temps was ~25-30 C (I know AMD has poor temp measure sub-30 so at least that's good)
Run CPU temps <40 C for Prime95 small FFT

Components:
MOBO: Gigabyte GA-970A-D3P
CPU : FX8320 (stock speed 3.5Ghz)
GPU : Sapphire Radeon R9 280x
RAM : 2x4Gb Ballistix Crucial Ram
PSU : Seasonic M12ll 620 Bronze
Drives : 256Gb Crucial SSD
Drives : 1Tb Western Digital
Fan : Cooler Master Hyper 212 EVO
Case : Corsair Graphite Series 230T
OS : Windows 7 Home Premium 64 bit

 
Solution
An Update on my progress: it currently seems like elevating the bottom of my case to promote air flow to the PSU solves the problem. My assumption is that the PSU went into self shut down due to the heat build up. It might make sense seeing that I placed my tower on top of cardboard on top of carpet so the bottom clearance wasn't that great.

It would also make sense as to why flipping it on its side solved the solution: aka more air flow to the PSU fan.
It would also explain why waiting a while (cool down time) solved the issue as well.

Ovdessel

Reputable
Jul 29, 2015
5
0
4,520
An Update on my progress: it currently seems like elevating the bottom of my case to promote air flow to the PSU solves the problem. My assumption is that the PSU went into self shut down due to the heat build up. It might make sense seeing that I placed my tower on top of cardboard on top of carpet so the bottom clearance wasn't that great.

It would also make sense as to why flipping it on its side solved the solution: aka more air flow to the PSU fan.
It would also explain why waiting a while (cool down time) solved the issue as well.
 
Solution