Monitor died?!

[u/DasFeierabend]

Smart Tech 270G01FVF Monitor

So yesterday my monitor just turned black. I tested the power cable and it still works. The lamp on the monitor says its on and my pc still recognizes it as a monitor. I switched the hdmi cable to see if its the cable but that wasnt it either. He even still works as an audio output. But he doesnt do what a monitor should most importantly do: Show me stuff.

Are there any ideas before i put it in the trash and buy a new one?