[usbcd36]

Well…there's quite a bit that could be wrong. Here are a few possibilities:

• First, are all five lights on the robot controller green or green and flashing? If not, there could be something wrong with your code, the link between the Operator Interface and the Robot Controller, or any number of things.

• Check to see that the PWM cables are plugged in correctly. On the Victors, the black wire should be closest to the fan (there's also a small "B" there), and on the robot controller, the wire colors are marked before the rows of pins.

• Check to see that you don't have bad PWM cables! If the controller is on and working (all lights are green/green and flashing), yet the LEDs on the Victors are orange AND FLASHING, you probably have a bad cable. When the Victors are receiving a neutral signal, the LEDs will be solid orange.

• Did you change the code at all? If you did, the program may be sending something other than what you intended to the Victors. Make sure you didn't comment out any drive code you meant to use.

This list is by no means complete, but it should provide a decent starting point.