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[SOLVED] System does not fully wake up from sleep

Last response: in Components
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July 19, 2011 5:15:21 PM

Hi there:

Situation: Acer Aspire M5640, 4GB, nVidia GeForce 8500GS, ST350082 SATA, light Chinese 300W PSU, running Vista Home Premium 64-bit. (None of that accepted as being THE problem :non:  ). OS & drivers are up to date.

The machine doesn't fully wake up from sleep: When I press the power button (or use KBD or MS), it stops blinking, fans are coming back on, HDD is moving, but the display stays black (No Input Signal) and the KBD NumLock light doesn't show.

Turning the machine off using the power button doesn't help. It never comes back from sleep until I either:
- Reset the CMOS (jumper) or
- Unplug the power cord (No switch on the PSU).

I removed the graphic card, reset the BIOS to default values, plugged a good ANTEC 300W PSU: No joy.

I saw many posts on the forum, albeit very few with a solution: None applied or worked. :cry: 

I supect this is a hardware/BIOS issue. I understand some PSU rail always stays on to enable WOL, could you please elaborate on that?

Needless to say, getting a working solution from you wizards would be even better. :D 

TIA

To mods: I'm not sure this is the best forum section. Please move this post if appropriate. TY.
July 19, 2011 6:33:53 PM

Alot of times blk screen or bsod on wake is a driver issue relating to your gpu. have you tried rolling back drivers....
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July 19, 2011 8:15:02 PM

Been there, done that. Thank you.
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July 19, 2011 9:00:00 PM

OK, problem solved: I just (re)flashed the BIOS with the following options:
Main BIOS Image
Boot Block
Destroy CMOS Checksum
Restart

Went into BIOS setup and loaded the optimized default options.

Rebooted and set my own BIOS options.

Et voila. :bounce: 

PS: Still didn't get an answer to my question about the PSU... :whistle: 
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!