Discovery 1 1997 with EUROVOX audio 7479 the car battery was replaced and the service disconnected the power. I have tried to restore radio operation with the 6 digit code but all I have on the screen is the symbol 1. at no stage did the word CODE appear which is needed to enter the security numbers. Have tried leaving the radio on for 10 hours to clear entries - removing the radio fuse and replacing to reboot power. I have disconnected the main battery and reconnected - no result. It did fire up temporarily when digit 1 was pressed repeatedly. it then switched off. Any suggestions?

Regards,


PJH