Overnight My Monitor Disconnects & Won't Turn Back On?

[Mike Lynch 0]

Hi! I leave an idle game and uTorrent on overnight but turn the monitor off.
Occasionally I go to turn it on in the morning & it says "No Signal".
Only turning the PC off restores it. Also the PC won't shut off with the power button, is that normal?
Windows 10, Benq monitor. This started maybe 2 months ago? It's happened 3-4 times now.
Thanks!

 

[Trevor Neale 0]

please check in the device manager for your display and graphics card
right click each entry then properties 

if there is a power management tab make sure 
'allow this computer to turn off this device to save power'
is disabled

i do this to any and all device manager entries to ensure my system stays on.
best of luck Steve ..