Monitor goes off-mode randomly.

My monitor gives me the "monitor will turn to off mode in 5 seconds" at the most random time and then it won't come out of the off-mode I need to reboot the computer. Ctrl+alt+delete doesn't even work so I have to use the restart button. If I was listening to musc it keeps playing normally. I turned everything monitor related in the power management to never and it still does it.

Any ideas?
 
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