Computer Won't Boot, Post, or give indication of errors. Restarts every 5 seconds

milescaraker

Prominent
Oct 20, 2017
2
0
510
This is a 4 year old pc with a 1 year old GPU in it. It has had its ups and downs, but it's always managed to keep going. Now, however, it seems to have something new wrong with it.

What's Wrong:
Upon trying to start the computer one day it never made it to post. The case lights up, all the fans start running, and a single switching sound comes from the PSU, but after about 2 seconds of fans, everything shuts off for 5 seconds, then repeats. The speaker on the MoBo never makes a sound,

Things that are in the build:
PSU: Corsair HX750
CPU: Intel core i7-3770K
MoBo: Gigabyte GA-Z77X-D3H
GPU: EVGA GTX 1070
RAM: 2x4GB Dell SNPP382HC

Things that were happening before this:
Task Manager saying I was running at high memory and CPU usage for several months prior.

Things I Have Done:
I removed the PSU and tried it on another computer, which it worked for. The computer I popped it into had a lower power requirement, so that may have something to do with it.
I have checked for a short in the case. There is nothing wrong with the case.
I have inspected the CPU. There are no bent pins or anything of that sort.
I have taken out all nonessential parts (GPU, storage) and tried booting. No dice.

What I Suspect:
I originally thought it was a PSU problem, but now it's looking like it's a MoBo thing.

UPDATE:
Resetting the CMOS seems to have done the trick! Thank you Alexoiu!
 
Try clearing the CMOS (unplug the power cord and remove the CMOS battery for a minute). Then leave only CPU and CPU cooler installed, internal speaker https://images-na.ssl-images-amazon.com/images/I/51PRzYJXmKL._SY355_.jpg connected.
Start the board and see if the CPU fan does spin and if any beeps. If no beeps, then try testing different power supply, if possible, or start considering a new setup.
 
Solution

milescaraker

Prominent
Oct 20, 2017
2
0
510


This seems to have done it. It's posted and stayed on for more than five seconds. I'll set things up and report back in a day or so to see if it's a permanent fix.
 

Justin132

Commendable
Feb 4, 2017
47
0
1,540
I had this problem before. Sharing my experience. I know there is a best answer already selected but I will just go on. I was playing a game which I had installed on my SSD and it was in fullscreen. The screen froze and I just shut down my computer. Then without turning it back on, it just kept restarting by itself all the time. I had a friend do something (maybe remove the SSD or do something with my memory) and then I had installed windows on my HDD. This seemed to fix it. I am not reporting a problem on someone elses thread, I am just sharing my experience so please don't hate.