Computer powers off randomly

[Neorix]

I've had this computer for a year and I've only just started having this problem. While using my computer it'll just randomly power off as though I've pulled out the power plug. Then it'll attempt to restart and sometimes it successfully restarts, but sometimes it'll power off again after about half a second. Then I get no response from pressing the power button and have to switch off the power from the mains until the motherboard power indicator light (not sure what it's called) turns off, and then power it back on again for me to even get any response from pressing the computer power button. Then I need to repeat this until it actually successfully starts up. It seems to happen regardless of what programs I have open, and whether its under any major strain or not.

 

I've already tried running the ram in different configurations to see if 1 stick was faulty but that doesn't seem to be the case. Also I know it's not due to overheating as I've monitored the temps of the parts since this began happening and everything is well within normal.

 

Specs:

PSU: Corsair AX760i

CPU: Intel Core i5 4670K

CPU cooler: Corsair H100

GPU: MSI NVIDIA GeForce GTX 770

Motherboard: Gigabyte Z87X-UD4H

RAM: 16GB Corsair Vengeance @ 1600MHz

Storage: 1TB Western Digital Blue

OS: Windows 7 Home Premium 64-bit SP1

 

 

[I need a better name]

I've had this computer for a year and I've only just started having this problem. While using my computer it'll just randomly power off as though I've pulled out the power plug. Then it'll attempt to restart and sometimes it successfully restarts, but sometimes it'll power off again after about half a second. Then I get no response from pressing the power button and have to switch off the power from the mains until the motherboard power indicator light (not sure what it's called) turns off, and then power it back on again for me to even get any response from pressing the computer power button. Then I need to repeat this until it actually successfully starts up. It seems to happen regardless of what programs I have open, and whether its under any major strain or not.

 

I've already tried running the ram in different configurations to see if 1 stick was faulty but that doesn't seem to be the case. Also I know it's not due to overheating as I've monitored the temps of the parts since this began happening and everything is well within normal.

 

Specs:

PSU: Corsair AX760i

CPU: Intel Core i5 4670K

CPU cooler: Corsair H100

GPU: MSI NVIDIA GeForce GTX 770

Motherboard: Gigabyte Z87X-UD4H

RAM: 16GB Corsair Vengeance @ 1600MHz

Storage: 1TB Western Digital Blue

OS: Windows 7 Home Premium 64-bit SP1

Welcome and please follow your own topic.

[Merlorz]

Did you actually test the RAM? (memtest x86 for example)

[Neorix]

Did you actually test the RAM? (memtest x86 for example)

I tested it using Windows Memory Diagnostics and that told me it was fine. Also, I tried booting off of each stick individually and still had the problem, so if it is the ram then both sticks must be faulty.

[Merlorz]

I tested it using Windows Memory Diagnostics and that told me it was fine. Also, I tried booting off of each stick individually and still had the problem, so if it is the ram then both sticks must be faulty.

 

To be honest I would test it with memtest and make sure it passes at least 2 or 3 times. Windows Memory Diagnostics isn't that good in my experience.

[superfly06]

it sounds like a psu issue random shutting off is a power supply over heating and not turning on is because the power supply failing the pre-start bios test

[Neorix]

To be honest I would test it with memtest and make sure it passes at least 2 or 3 times. Windows Memory Diagnostics isn't that good in my experience.

Tried testing it with memtest but it kept powering off before it could finish the entire thing.

 

it sounds like a psu issue random shutting off is a power supply over heating and not turning on is because the power supply failing the pre-start bios test

How could I confirm if the psu is the issue?

[GoNinty]

make sure your PSU is getting enough air. when building my PC i had it placed on a towel and it kept shutting off randomly during windows installation. after just setting my PC on the table it was fine. checking the PSU and other components for dust might help.

[Neorix]

make sure your PSU is getting enough air. when building my PC i had it placed on a towel and it kept shutting off randomly during windows installation. after just setting my PC on the table it was fine. checking the PSU and other components for dust might help.

The PSU is definitely getting enough air from where it is and there doesn't seem to be much dust on anything either.

[Queek]

The PSU is definitely getting enough air from where it is and there doesn't seem to be much dust on anything either.

Do you have another PSU handy that you could try instead of this one?

[Neorix]

Do you have another PSU handy that you could try instead of this one?

No I don't have a spare PSU to use instead, any other ways I could figure out what's wrong?

[Queek]

No I don't have a spare PSU to use instead, any other ways I could figure out what's wrong?

It might be a loose cable. Unplug and firmly plug in each of the cables going from your power supply to your components.