I use my laptop as a CPU, connected to a monitor because a few months ago there was an issue with the screen itself. This morning I tried to restart it to open the Pc in safe mode but it never opened again. The screen went black but I can see the pc working from the keyboard and other lights. The monitor says it is getting no signal from the hdmi source. Since I can’t see the screen, I can’t do any screen clicks. How to solve the problem?