When I lock my PC (⊞+L) the monitor will display the lock screen for roughly 30 seconds, then the monitors all go black. They'll stay black for about 10 seconds, then the lock screen returns. Then this cycles, over and over, for hours, with the screens only going black for 2-10 seconds at a time, then displaying the lock screen again.
It never times out. The monitors never fully shut off.
I don't know if this is a monitor setting or a Windows setting that is preventing it from eventually turning off, but it's frustrating and I'd really like to fix it.