[Kevin Sevcik]

On your driver station, there should be three diagnostic lights towards the bottom of the screen: Communication, Robot Code, and Joysticks. All three should be green. If one of them is red, that's a good clue as to your biggest problem.

Another good diagnostic is the Robot Signal Light. What pattern is it flashing in?

Also, the Jaguars will flash until you click the enable button and enable your robot. That's normal.

For the one Jaguar that's not lighting up, are you sure you have power connect to it and to the correct terminals? And are you sure you have a breaker installed in the Power Distribution Board for the terminals the Jaguar is connected to. The easiest way to check all this is to use a multimeter to measure the voltage across the V+ V- terminals on the Jaguar.