The 492 hand controller is a very simple electronic design. If you’re comfortable opening the case and checking continuity with a multimeter I’d suggest you do that. For now just check that the switches are making contact when pressed (they can get dirty or rust and not make contact). Also make sure all cables are connected to the pcb (there should be 6). If these steps fail to show the problem, then check the continuity on the cables from the pcb to the connector.
If all fail then the issue might lie in the mount controller, could be the connector, the pcb leads or other components inside. It’s best to try the easy stuff first and report back.
Good luck
Jonathan
