I have talked to the gentleman who designed this radio and he said that in order to correct this problem two pins on the inside of the front panel must be shorted while 6.2 volts dc is fed to the battery terminals. The whole radio must be disassembled to reach these pins, I have not been able to find a service manual to help me locate said pins. If anyone out there can find out where to get a service manual please contact [email protected]