1
If this isn't working see if others are having the same issue, check the cable and then run a diagnostic.
2
If this happens to your computer, wait, then hit Ctrl-Alt-Del. Finally, hold the power button until it restarts.
3
You might get a message warning about this. Hit Alt F4-do not hit OK!
4
Check that these are on -both on the computer and the monitor
5
Check the source of this first
6
Write it down and look it up!
7
Make sure these are plugged in to correct ports
