I've recently changed battery in my 2004 mondeo. Radio is 6000cd. And sound dissapeared. Radio working as usual, finds radio stations, showing that CD is playing. If I turn volume into max you can hear a very weak sound from the speakers. Tested by pushing 3 and 6 buttons together. Test works great, full sound from the speakers.

Cheched fuses. Removed working radio from another mondeo. The same story.... In the other car both radios working fine.

Does anybody have any ideas?