External monitor connected to notebook, shows: VIDEO FREQUENCY TOO HIGH and no picture, why?

Al
5

Why can't I see an image on the monitor?

The monitor is recognized by the notebook.

Ni

The error message says it all: the screen can't use the signal offered, set a lower number of horizontal lines.

Al

How do I adjust that?

Ni

Windows settings system display

Al

But then I wasn't able to adjust the frequency!

Ni

But the screen setting (s), the first number are the "columns", the second the "rows" (= frequency)