Tip: it could happen that the CFULLHDMA is crashing and that it does not react to the remote control anymore to reset it.

The first solution is to remove the power connector, but a 2nd not documented feature is to do it with the ‘green’ button at the backside

Press the ‘green’ button 1 time for about 1 second, then release, then press again for 5 seconds. The CFULLHDMA will be turned off.