Since yesterday my Laptop won't turn off anymore. When I shut it down, it takes a few seconds and then it turns itself on again. Doesn't matter if I let it boot and shutdown again, or turn it of in pre-boot.
I've disconnected all external devices. It happens on power supply as well as battery power. Had to remove both to keep it off.
When I plugged it back in this morning, it stayed off. I then booted it and directly shut it down again for a test and got the same behaviour.
Laptop is a HP ProBook 650 G1 with Windows 10.
Any ideas was this could be? I'm thinking hardware failure right now but I'm at a loss. I don't even know how to tag this question :-)
EDIT
Things I tried according to comments:
powercg /LASTWAKE-> zero entries- Disabled automatic restart after failure
- Checked Fast Boot option, was already disabled
- Wake Timers disabled
- No matching task schedules
I also experimented a little more. These are the test cases:
- Shutdown Windows normally -> happens
- Interrupt startup before boot after normal shutdown -> happens
- Interrupt after normal shutdown and leave without power over night -> doesn't happen
- Switch off booted machine hard (long press power button) -> doesn't happen
- Interrupt startup before boot after hard off -> doesn't happen
EDIT 2
powercfg -energy resulted in 6 errors. Unfortunatley the report is in my system language German, I'll try to translate/summarize
- 4 errors about energy policy (disabled automatic standby, screen off/darkening)
- High CPU load
- PCI Express-ASPM (Active-State Power Management) disabled due to known hardware incompatability
