[SOLVED] PC Turns On Then Immediately Off From Sleep

[babbar]

eveytime i turn on my pc from sleep it turns off a few seconds after i press the power button. i have to press it again for the pc to turn on. the second time i turn it on i hear the "post beep", see my bios logo, Windows resuming loading screen then about a minute later my desktop.

this is what i've tried already:
Loaded optimized defaults in bios
Made sure all connections are properly plugged in my tower.
Reinstalled Windows 7
Updated all drivers


Adittional info:
I installed a fresh copy of Windows 7 Ultimate 64 a couple days ago (same disc i used before, never had a problem with it)
Installed a USB hub connected to my mobo.

Could this be a PSU problem?
Any help will be greatly appreciated thanks!

[Nate1190]

I had a problem like this before. It turned out I wasn't suposed to be pressing power to wake the computer up because it would just end up turning it off. Did you try pressing some keys on the keyboard or something else to wake it up?

[babbar]

i always use my keyboard to turn on my pc. i just put power button on top to make it simpler.

[dai]

what are you running
video card
cpu
m/board
ram
power supply
brand
wattage

check the listings in the bios for voltages and temperatures and post them

[babbar]

Gigabyte ma790gp-ds4h (f7b beta bios)
amd phenom x4 9850
ultra x3 1000w psu
hd3300 onboard graphics

[dai]

in the bios check these enabled

pnp
wake up from k/board [select which option suits you]
apm

if the power button option is set to sleep,you press it once for sleep and hold it in for about 6 secs to shut down

to wake from sleep move the mouse or press a key

i had problems with sleep in win7 and found the cause to be a usb stick i used to leave in to backup odds and sods

[babbar]

yeah i have wake up by keyboard enabled, i meant to say that i press the keyboard to wake pc not the power button. i was told since i was using a beta bios that and windows 7 could be causing it so i'm planning to downgrade as soon as get a hold of a usb drive.

[dai]

we will wait and see the result

[babbar]

It turns out the BETA BIOS version i was using caused this, i recently downgraded and everything works fine now, thank you everyone who tried to help.

[dai]

glad you have it sorted