The Controller showing original audio boards (1st picture)

and replacement audio (2nd picture, above the batteries):  




Circuitry below the keypad for the steering, keys and leds: 



Power and Rover Control switch: 



Mode switch (Rover Attack 1 and 2, Spacial operations, Demonstration, Rover Control 1 and 2): 



The Leds are only lit one at a time, camera shutter speed is too slow in this photo: