[Need Help] Computer Power Cycling Problem

[xXfanaticXx]

Hello everybody,

I've been having problems with a computer, it can just auto turn on without pressing any thing at all (from cold state). It power cycles, on and off, even if I let it idle in the bios, it can just suddenly turn off and on by itself again and it keeps cycling like that. Sometimes it stays on longer, sometimes less than 20 seconds.

I've reseated the GPU, and RAM, tested the ram sticks, It happens even when using 1 stick.

I tested with a different PSU and still the same problem, it auto turns on/off.

Even with only power cable, hdmi and Keyboard plugged, storage devices all unplugged (sata+power), still running into the same issue.

Any ideas what might be causing the issue? It just happened out of the blue.

Thanks in advance!

 

[tsteo77]

I think this is mother board problem. Bring your pc to sls to confirm.

 

[LiLAsN]

It could actually be as something simple as having a BIOS settings where you allow your network or even USB devices to turn on your PC.

And depending on the kind of keyboard or mouse you have, be it wireless and whatnot, or even a misbehaving keyboard where a certain key in constantly being triggered, it could cause the PC to turn on.

Also, other than the things you've mentioned, if you have a loose wiring like for example, your PC case's power button cable connected to the motherboard but it is slightly loose on either side, it could be the cause of the PC turning On and Off as well.

So you should redo the experiment but do not remove the drives. But remove all USB devices only. See if it still triggers your PC to turn On and Off randomly.
If it doesn't, then try connecting your USB devices 1 by 1 to find out which is the culprit.

Similarly, if this only happens in BIOS, then it could be a BIOS issue. Try upgrading or downgrading even to an earlier BIOS where you know you never had such an issue before.

Then once you've ruled out as many factors as you can, then you can consider changing parts that you deem to be misbehaving such as the motherboard if nothing else seem to solve the issue.

 

[alamakazim]

Casing how old? The power switch on the casing could be sticky

 

[xXfanaticXx]

Thank you for the replies everybody.

I decided to re-seat everything, including the cpu itself. Basically taking everything apart and putting back together again, testing, plugging something else in, testing etc.

Cleared and changed the cmos battery too.

Currently as of now it is currently running fine, everything is plugged in, including the case power reset buttons, internet, 4 sticks of ram.

Have no idea what the true cause might be, but its currently working now, so I'll take it.

Thanks again for the help!