I recently reinstalled Windows 10 on my laptop, since then it has been randomy not sleeping properly. After I had shut the lid of the laptop, I'd come back and find the laptop was 'on', as in the fan was running very quietly, the power lights and hard drive lights were on, but the screen appeared to be off. Pressing buttons or touching the screen did nothing, I had to turn it off by pressing the power. At first I didn't pay much attention to when this was happening, and I assumed some software setting was waking up my computer, so I changed the lid close setting from 'sleep' to hibernate, so it would require a physical button press to wake up. It continued to happen, and I've since realised that it is not waking up, but rather not sleeping or hibernating properly. Occisaonly when I close it, the computer dosen't power off like it should, and opening the lid back up shows the computer still on but unresponsive, with a black screen, having seemingly not entered hibernation.
Does anyone know what could be causing this?