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Computer turning off before boot (cycle)

Hello everyone,

My computer keeps shutting down on it's own before it even turns on. This has been going on for a few months, and I initially thought it was my powersupply (it was a 3-4 year old rocketfish 900W PSU). I replaced it for a Corsair RM850 but the problem still persists, and I'm not sure what it can be. The symptoms are basically that while I game or do random tasks, the computer freezes and when I restart it, it turns on and off. The only sound I can hear is coming from the PSU (it does a click sound when it turns on and a click sound when it turns off), but I highly doubt the PSU is the problem since this one is brand new. It happened to me with a GTX 660ti, then I upgraded to a GTX 970 and it still happens. I've been able to boot the computer by disconnecting things and connecting them again. One time I disconnected a case fan and it worked, a second time I disconnected one of the HDD I have and it worked, in this instance a few minutes before writing things, I disconnected a stick of RAM and now it works. Could it be a motherboard problem? If anyone has any insight, I would greatly appreciate it!

My rig:
Gigabyte GTX 970 G1 Gaming
Intel i5 4670k @ 3.40 GHz
Corsair RM 850W PSU Gold Certified
Sector5 DDR3 RAM 8GB 1333 MHz
Creative Titanium HD Soundcard
3 HDD and 1 SSD
3 answers Last reply Best Answer
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  1. Best answer
    I think the issue may be a RAM problem or a virus. Download and run Memtest. See if you have a bad stick or both are bad. If both sticks check out, check to see if you have a virus or malware on your PC
  2. Run Hard disk Sentinel and do a "Short self-test" rule out your hard drive.

    Ram is mentioned to rule out data corruption with bad read write errors corrupting windows. memtest it one at a time. I like to do it with it on a bootable USB flash drive.

    Virus scan it to look for windows corruption.

    You could put new thermal paste on your CPU to fan and reseat your cpu.

    rule out bad components like your sound card by uninstalling.

    once you rule out all your components then you assume its the motherboard.


    If you have a second hard drive laying around maby you can try a fresh windows install and see if that clears it up.
  3. Thank you both, I have ruled out the RAM, I replaced it anyway. I tested all the harddrives and they are fine, I am still going to install the OS on my new SSD because it's getting really slow. I will wait for the error to happen again and will remove the soundcard. I will keep you guys posted. Thanks again!
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