Hello
In Europe, TVs and monitors have 50 hertz frame rate, the USA has 60 hertz.
Most monitors detect the signal automatically. If you set it manually, I would choose 720P-50Hz,
or try 720i-50 Hz.

As a test, I would plug the MAG box into the HDMI of the TV set and see what happens there. There are devices
e.g. from Panasonic, which do not recognise a MAG box. So see if it's the box or the monitor. Good luck.

Hello
Does no picture mean the screen stays black? No menu of the box visible? You would need to know this before searching for the cause.

Greetings