Icecreamslick--Assuming everything is charged and turned on and plugged, the DMD and MF unit can find the cause of the problem itself.

This is directly from the user's manual:

" . . . switch off the transmitter and T-03. Do not disconnect battery. Turn on SW3 switch of MF-01 (slide it to right). All units start checking themselves (make sure that each unit works in order). If there is no problem with MF-01, operation indicator of MF-01 flashes green to red alternately during this sequence. If indicator does not shine or any of the unit does not move, seek repair. DMD Control Unit T-03 can check itself separately from MF-01. In this case, switch off transmitter and T-03. Then, disconnect communication cable of MF-01. Turn on transmitter and T-03. Operate transmitter and check main gun elevation and turret rotation movement."

This segment is about Reinitializing DMD control Unit T-03

"If there is trouble with your system, T-03 can be re-initialized to the preset condition. First, switch off T-03, then push and hold down setting button. While pushing setting button, switch on T-03 and wait for 20 seconds. Indicator shines orange or green when reinitializing is completed."

Good luck!