I have the Prodigy Advanced 2 system with two wireless throttles. Everything has been in boxes for about 5-6 years.The displays on the wired throttles are unreadable. One wireless throttle works well when plugged into the command station. When unplugged, it is unresponsive. The 2nd wireless throttle is dead. The receiver unit has a blinking red light. The green light does not come on. Any suggestions appreciated.