[Al Skierkiewicz]

Manoel,
It is possible for you to have checked all the FETs good and still have a problem in reverse. I did come across a few Victors at inspections and other times that did not take the calibration the first or even second time. However in you case since you stated that the LED was coming on in the correct position of the drive , I suspect that the driver for the FETs may be bad. Generally, the FETs short when defective. During operation if no drive is applied and the brake jumper is in the "coast" mode, all FETs are off. If you set the jumper to brake does the Victor actually brake? If so, all the FETs in the low side (that's 6 for those who are counting.) are good. If you do calibration with joysticks and the LEDs go full green and full red, I would contact IFI about repairs. I am sure they would like to find out what died as much as I would.
For the rest of you, the motors back driving a voltage into the robot was covered in another discussion some time ago. Search the archives or I will when I get a chance.