Problems waking up from sleep, PSU issue?

[llee8820]

Hi all, lately my computer hasn't been able to wake up from sleep mode. Before I would normally hit a key or move the mouse and it would wake up just fine, but now nothing happens when I do. The temporary solution I found is to flip the switch on my PSU, wait 5 sec or so, and the flip it back on and press the power button. Do you guys think something is wrong with my PSU? I'm unsure of what happened or what is going on.
Thanks for the help!

 

[bolinder]

Any recent changes otherwise? My computer wouldn't wake from the keyboard, but it was just the hardware power management settings. Have you tried that?

Start -> Control Panel
Click Mouse
Select Hardware tab
Click Properties
Click Change Settings
Select Power Management tab

Same for keyboard (substituted for "Mouse" above).

 

[llee8820]

No recent changes that I'm aware of. I checked both settings of mouse and keyboard the option to wake is checked. What confuses me is even if they weren't checked, I should theoretically be able to wake up my computer from the power button. But that's not working either, only after I have to flip the switch on and off on my PSU.

 

[FeuerFrei]

Maybe it's going into hibernate, rather than sleep.