I scheduled a task in Windows 7 to play music at a particular time of the day. The scheduler allows a setting that makes the laptop power up from Sleep/Hibernation mode automagically. I guess that would be some setting that windows does on the BIOS.
Now there is a setting that allows me to specify that even if the PC is on battery power run the task. Also in my power settings I have enabled Allow Wakeup Events when running on battery.
But somehow the PC is not powered on automagically when the AC power is not connected. It does resume from hibernation when on charging. The battery is new so that should not be a problem.
Why is the PC not able to resume itself from hibernation when not connected to a power source?