Windows Vista - HP m8125x

My computer goes on sleep not not wake up. On reboot and safe mode its works ok. But every I try to reboot normally, its comes on and few minutes later monitor goes on sleep then never wake up. Help.....thanks

Hi,

Check your Power Management setup. Under Control Panel > Power Management > and setting for timeout are there, set these to never go sleep, I believe the Power Option is "Always On"

Also check you screen saver settings, right-click desktop > properties > screen saver tab. You can also access Power Options from here towards the bottom of the dialogue box.

Hope this helps you.

Same thing happened to me last year.  It started out with the monitor NOT waking up but with a reboot it would work.  Eventually it didn't matter what i did, most of the time my monitor would not stay awake for longer than 5 seconds after a reboot. 

After checking all the power settings (this took some time as the monitor would not stay awake for long), i made a guess and changed my video card.  I haven't had the problem since.