Sent a message to support. But - all three servos are getting proper voltage (4.45 v on red, 0 on gnd), and the signal lines read around .225 volts - which is almost exactly right for the PWM signal to zero the servo. I’ve carefully turned them, and one - the camera servo will sometimes come to life for a moment and move itself to the zero position. Can’t imagine all 3 servos are bad. Have ordered a little servo tester that comes with another manufacturer to test them outside the rover. But - any help would be appreciated.