Ask a Car Mechanic and Get Answers to Your Car Questions ASAP
I'm Neal and I am here to assist you. Only accept when you are happy with my assistance. If I can't help I will open your Question to other experts.
You can try disconnecting the battery or removing the radio fuse to see if it will reset, but in most cases the unit will need to be replaced.
They are not built to be repaired and the best route is a replacement unit.