I have a strange problem here with my laptop. It has started to always restart when I ask it to shutdown. The shutdown process works as normal, but after the machine turns off it stays off for about 3 seconds, and then turns back on again.
I have tried the following things:-
Updated the BIOS to the newest version
Disabled all Wake on Lan options in the BIOS (none were set)
Reset all Power Management Options to default
Looked in the event log and cannot see any issues
Updated all software
Installed Secunia PSI and updated any software it highlighted had new versions
Ensured all Windows updates were present
Gone to Dell's website and looked for updates to drivers for LAN hardware - none found
Checked to see if I had any Nvidia drivers installed, none found - uses Intel integrated GPU
Reset the BIOS to defaults
I'm struggling for ideas now. Anyone have any others to try?
These issues only happy if the laptop is plugged into AC power. If the laptop is shutdown when using battery is shutsdown properly, and stays shutdown even if the AC power cord is restored.