Keyboard or mouse wakes desktop, monitor screen black but it's ON green light is lit. "Input Select DSUB" shows up upper right of screen. Has happened many, many times.
Most recently above happens, exactly but with a variance: Monitor displays an unusable, much darkened desktop image and cycles from this to totally dark, quickly.
-Has used Dell diagnostic and monitor passes along with everything else included in test.
-BIOS ver. 3.3.6. 9/30/16
Monitor Sceptre X20WG NagaII
Desktop Dell 3650 i3 6100
OS Windows 10 Home
In order for forum members to help resolve the issue you are having with the monitor please post monitor model. Also, your computer model and the Operating System installed.
You should use Wired mouse and keyboard and TURN USB sleep off.
Monitors do not wake the computer does.
20.1" LCD Monitor
1680 x 1050 resolution
Keyboard and mouse not USB connected. Turned off USB Sleep but no change.
-Turned Sleep Settings to Never in both fields.
-Went to Power Settings changed the following:
HD Turn Off changed to Never
USB changed to Disable
Display changed to Never
-Now changed Sleep Settings back to 3 Min for Monitor , 15 Min HD.
Powered OFF and then ON, let 20 minutes pass without using the PC, apparently went to sleep, hit the mouse key and restarted fine.
Many thanks for the responses.