AW3821DW, no display

While using my computer, the screen suddenly didnt show a thing anymore. It just was and still is this on but black light mode (dont know how to explain), like when it shows no signal from a computer when turning off or on. But now it doesnt show anything, not even the settings which can be normally opened with the buttons on the back. I tried switching video ports between this and another monitor, but doesnt help. The audio connection between monitor and pc still works.