I recently upgraded my monitor to an Acer XR341CK. I still have the Samsung Syncmaster 2343 mounted on the side (now portrait). When I get up and leave my desk, I always "lock" my pc via the Windows 10 lock option. When I only had my Samsung monitor, the display would basically turn off, but the monitor remained powered on. I liked this, as it seems the monitor is saving power and display life. The new Acer goes dark, but not totally dark. The display is still on but showing black with backlight bleed... I want this thing to last as long as possible. How do I make it sleep like the other one when I lock the computer?