My PC seems to not be able to go into standby automatically anyway

So I came back from showing and normally after this much time the PC would be in standby where I have to hit the Power button to wake it up.
But it doesn't do that anymore my PC is running but it does not react to mouse movement or keyboard.
The monitors don't get a Signale and the indicator LEDs of the keyboard don't update anymore when I do things like disable the nempad