Windows 8 - New build PC keeps turning itself on

gam3r · 27 Sep 2014 at 11:34

Hi All,

Recently I've put together a PC and it works fine. However it randomly seems to turn itself on during the day every few days or so.

Any ideas what could cause this?

malachi · 27 Sep 2014 at 17:47

Check for any form of overheating and your PSU.

Elevon · 27 Sep 2014 at 22:26

I have also seen faulty PSUs do this as well,happened to me about ten years ago.

zola25 · 28 Sep 2014 at 10:00

Is this from standby, or are you using a sleep/hibernation mode?

If the latter fire up an administrative command prompt and type:

powercfg -lastwake <enter>

gam3r · 29 Sep 2014 at 14:52

malachi said:
Check for any form of overheating and your PSU.

Temps seem to be fine when in Windows.
The PSU itself is new, Corsair CX750 or something.

zola25 said:
Is this from standby, or are you using a sleep/hibernation mode?

If the latter fire up an administrative command prompt and type:

powercfg -lastwake <enter>

This is from completely being switched off (after a shutdown).

I've also noticed it randomly reboots then cycles on and off when it posts. It boots up fine after a while.

linktoinsanity · 30 Sep 2014 at 09:46

Check your "Wake-on LAN" settings for your network card in Device Manager. Untick "Allow this device to wake the computer" if ticked. Also, check your BIOS/UEFI settings for the WOL feature.

Failing that try another Power Supply.

b0rn2sk8 · 30 Sep 2014 at 21:12

Check your power switch is not faulty.

Also update to the latest bios may get rid of the cold boot posting issues.