Lapbook plus HDMI issues


I have tried to connect my lapbook plus to a TV by a cable mini HDMI and also an adapter to mini HDMI plus HDMI but nothing happens.

I have tested it with another device and the cable works, also does the screen.

I have only reached to display the image in the screen a couple of random times, but the most of the times I didn’t succed.

Do you have any idea?