Servus, we have 2 of these installed in the management, I am not aware if there are any difficulties between the box and the screen.
The management would contact me immediately if there were...
Of course, there are many possible faults: computing power, too many procedures on the bus, and last but not least, the Icy Box itself.
Technician hours are expensive and exceed the value of the box by far. Why don't you order a new one and try it out? You are still under warranty for both devices ... Greetings from Munich