Was having this same problem and I fixed it. Check to make sure it's actually not waking! In my case the computer itself was waking but the display adapter was not. I could hear the processor fan come back on, the hard drives spin up, but nothing on my screen. In my BIOS, there was an option to not let the integrated graphics adapter sleep. It was called "RC6 Render Standby" and I turned it off -- fixed!
windows 8 won't wake up from sleep mode
I have a Dell desktop with Windows 8 and it will wake up from sleep mode if not in use for awhile but if left for longer periods it goes into sleep mode and will not wake up. I have tried to wake it
- touching mouse
- touching power button
- using windows key + C
- no results unless I do a hard power down
Now it has started to download windows updates without installing them
The best I saved for last...it will not shut down it only goes into Power Save mode
very frustrating...suggestions please?
Windows for home | Previous Windows versions | Performance and system failures
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Anonymous
2016-10-24T21:55:29+00:00 Hi Anuja,
For BIOS configuration concern, we suggest that you contact your device manufacturer for immediate assistance. Just to ensure that necessary configurations to be done are correct.
If you have further concern, feel free to post. We're always here to help.