I have 2 of these. One mounted permanently in the rally car and one set up so that I can temporarily use it in our service rig.
The service rig one is being recalcitrant. I cannot seem to program it using the remote control mic. Most of the buttons seem to be locked but I can't figure out how I might have locked them. They give the negative beep when I use them. Any ideas? Is there some magic sequence that I've accidentally triggered?