[Alan Anderson]

My standard advice for this symptom is to make sure you've tethered the OI and RC with the red cable to get the team number set properly in the RC. Then make sure you know the black radio cables are good. After that, call IFI and tell them what's happening. They'll be able to guide you through troubleshooting the system, and if it's still broken after all that, they'll be able to arrange a replacement radio.