Question Screen is black

Dec 9, 2019
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Hello i have aoc g2460pf
A strange thing is happening with the screen.
I hear the computer enters windows but there is a black screen. Sometimes when i try to restart and unplug everthing it starts. (When i het home from the army its working when i go for a week it doesnt)
I tried loading the computer to a tv and it works fine. I am using dp for the monitor and hdmi for the tv. What can be wrong?