Computer turns off after a few seconds.

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reccless

Commendable
May 31, 2016
5
0
1,510
I started having a problem this past Saturday. I turned my PC on and nothing happened. The lights briefly lit up, then nothing. I tried it again and it turned on and got to my homescreen. It shut off again after a few minutes. I tried a few more times with the same results. Today I tested a new PSU (CX750, I had a Seasonic when I began having the problems on Saturday), but the problem persists. LED's light up and fans spin, including the PSU and heatsink fan. I followed the trouble shooting steps detailed here that I found on another thread, and I'm still having the same issues.
I pulled everything out and tried the breadboarding method I saw posted as well, to no avail. When I tried it with no memory and the speaker attached, I got a long beep and it quickly shut off again. Tried it again and this time it didn't even make it to the beep before it shut off. I reapplied thermal paste and re-seated the heat sink, with the same results. I imagine the issue is my mobo, but wanted to ask for any advice someone here may have.

Specs:
i5 3570k
asrock z77 extreme 4
GTX 670
Hyper 212 evo
cx750m PSU (also Seasonic 620)
8Gb RAM

One other thing: Almost a year ago I was gone for 2 weeks and came back to my ethernet port and modem completely dead. I figured it was lighting related, so I installed a network card and everything seemed to be working just fine. No other components or electronics at home were damaged.

Edit: I built this nearly 4 years ago and haven't upgraded much. Haven't overclocked anything either.
 
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marko55

Honorable
Nov 29, 2015
800
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11,660
My first thought is a thermal issue but it would be odd for that to come out of nowhere after all this time. The Asrock boards back then were infamous for heatsinks not getting enough pressure on the CPUs because the PCBs were thinner on the ASRock boards than many others. I had to put washers on the screws on the backplate on my z77 extreme4 to get good pressure & thermals for my H100i. If you can get to the BIOS at least you can watch the CPU temps and see if they're creeping up then its cutting out.

Hate to say it but your board may just be crapping out on you. Do a good visual on the capacitors on the board to see if any are bulging. If its happening at erratic times it could very well be the board not holding consistent voltage and the over/under-voltage protection on your PSU is kicking in an shutting it down as a protection measure.

Hope this doesn't come across as a silly sales pitch but coincidentally I have that exact same mobo that's 100% functional that I was just about to put up on ebay to get rid of. Obviously can't guarantee its your mobo but if you're interested let me know. I caught an insane deal on an EVGA Z77 FTW last year and the extreme4 has been sitting in its box since.
 
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R

reccless

Commendable
May 31, 2016
5
0
1,510
Thanks for the reply. I looked at the board but can't spot anything that stands out. I apparently got an extended warranty through Newegg that runs out in 10 days or so. I filed a claim and have to send the board and get a gift certificate if approved. Can't find too many options unfortunately.

As far as thermal issues, it ran really cool on idle, and would get up to 62c while playing overwatch. This was Thursday night the last time I did anything intensive and monitored Temps.
 
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