Boots up for 1/2 - 1 seconds then turns off.

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ItsACake-Nyaa

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Aug 28, 2014
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When I switch on my computer, it boots up for half a second then turns off, and keeps repeating itself until I switch off the power button.
I tried booting up without the GPU, RAM,I even tried booting up with 1 RAM as well as changing cables including unplugging and replugging cables, but no luck.
Any ideas?

My system is:
CPU I7 4790K
Motherboard MSI Z97-G45 Gaming
Memory G.Skill Ripjaws X Series 8GB (x2 4GB)
Storage Samsung 840 EVO 120GB (x2)
GPU MSI GeForce GTX 970 4GB Twin Frozr V
Power Supply EVGA SuperNOVA NEX 650W

I have my suspicion on either the CPU or motherboard, I doubt it's the PSU since all of these are quite new. It was working fine until last month when I had to pack up my computer stuff to move house.
 
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George Mulligan

George Mulligan

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Sep 20, 2014
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The motherboard doesn't like something in your hardware.

Disconnect all disks, fans, panel connectors. Remove GPU. Ensure RAM is in correct slots (RAM is needed for boot) and well seated. Did you buy the RAM as a 2-stick set? Double check that motherboard power connector is properly seated. Use a jumper on the power switch pins to attempt boot. If it fails, use a jumper on the clear cmos pins. If it still fails, you either have bad RAM, a bad motherboard, or a bad/improperly seated CPU.
 
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ItsACake-Nyaa

Reputable
Aug 28, 2014
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4,510


I've tried disconnecting the disks, fans and the panel connectors. As for the RAM, I've already checked it by switching out RAMs to different ones, but still same problem. I actually haven't taken out the CPU ever since I put it on. Can it actually become loose?
 
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George Mulligan

George Mulligan

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Sep 20, 2014
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Not really. Those sockets are pretty foolproof. It sounds like you've narrowed it down to the CPU or the motherboard, so you might as well pull the CPU and see if any pins are damaged on the motherboard. Be careful not to touch the pins on the motherboard or the pads on the CPU. If the pins are fine, you can try to reseat the CPU and attempt a boot. For a quick trial, you won't need heatsink, but if it successfully gets to POST, then you'll need to quickly power down and reinstall heatsink.
 
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