Yes both the dead man and operator present switch is working. First thing I checked.

Some machines may have service mode, that's engaged by removing a certain plug, as I do not have wiring diagram of this machine, I cannot tell you the adress of the plug to check, however you could check the plugs under dash and footrest and armrest. Also is the deadman switch working? Under the footrest (pedals)there's maybe a light confirming it's pressed/working.