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Sleep works if I press Fn+F4, and the settings in power options are as they should be - set to sleep if the lid closes.
Possibly related, the keyboard light doesn't work. I can press Fn+Page Up, the on screen graphic appears telling me it's on, but nothing.
Strange, isn't it?
Could be a fractured cable internally.
Try changing the settings, rebooting and changing again.
Could just be a bad driver update/install. Ask your IT guys if the system image they look after works and then get that installed over your cobbled-together version.
It is waiting for you to sleep, when it will attempt to kill you.
It is just waiting. Waiting for you to sleeeeeeep.
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Have you tried a hot milky drink, that always helps me sleep
Could be the little rubber dabber that pushs on the 'board is split or stuck, or most likely, full of biscuit crumbs.
Hot milk with a shot of scotch in, works every time! 😀
sensor, cable or policy changed. I think a recent windows update reset some of my power saving settings or flipped me off the one I was on. Or the cat danced on the keybord again....