My system is having occasional, random shutdowns

dave_trimble

Honorable
Jul 3, 2013
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10,530
This ended up pretty long, but I wanted to make sure y'all have as much info as possible before advising me.

Over the last couple of months, my system has, on occasion, randomly shut down. I doubt it's a heat issue, as I never get any dangerous temps even when stress testing, and these shutdowns have happened just as often (if not more) while just browsing the internet. Because these shutdowns happen randomly, and at the most often I'll only experience like one per week, I feel like it's going to be a little difficult to isolate.

Furthermore, there have been times in the last month or so where my computer will not turn on when I press the power button. Sometimes it happens in conjunction with one of the random shutdowns, sometimes it happens when I'm trying to boot up my computer after it was shut down normally. The first time this happened, I tried switching out the power cord, and was fiddling with a few other things when it suddenly turned on normally again. More recently, it has taken more effort and experimentation to get it to boot up. I thought I had it figured out a few days ago when I fiddled with the power switch wires where they plug into the mboard, and it started up normally right after that. But then this morning, the computer shut down while I was using it, and would not start, and messing with those wires gave no help. It once again started up after more random fiddling.

So I would appreciate any help or advice you guys might have for me. As far as I can figure, it's likely my PSU or motherboard that's the culprit. I don't have an extra PSU sitting around, so I'm loath to purchase another one just for testing when I have no way of knowing when the next shut down could happen.

My specs:

i7 4790K @ stock clock & voltage
MSI Z87-G45 Gaming Motherboard
16 GB Gskill DDR3 2800
MSI GTX 980 Ti
Samsung 850 Pro 512 GB SSD (OS)
Crucial M500 960 GB SSD (Storage/media)
Seasonic SS-1000XP Platinum PSU
 
More than likely your PSU, but you have a very good one! It is possible that you power button is shorting. Does that mainboard have an on off switch so you can eliminate your cases power switch to take it out of the equation. If not, you can just short the pins with a screw driver temporarily.
 


I can't remember if my motherboard has an on/off switch or not. I'll have to check when I get home. Otherwise, I can try shorting the two pins as suggested. I don't know why I didn't think of doing that. Thanks for the suggestion!

And yeah, I went out of my way to invest in a quality PSU, so I would be a bit dismayed if it's the culprit. Luckily it comes with a great warranty.