I used hybrid sleep for a year without any problems.
Suddenly, since this week, Windows can't wake from it. It starts loading, I can hear the fans and the HDD spinning, but the screen stays black.
I then have to power it off completely and turn off the PSU for a few seconds to boot into Windows again.
Everything else works fine (normal booting, restarting, regular sleep, hibernate...).
- reinstalled Windows
- tested RAM with Memtest
- tested the HDD for errors
- reset BIOS
(Motherboard is a GA-EP31 DS3L, a SATA and a PATA HDD, 5450 GPU.)