I have just purchased a '97 A4 with a Delta CC radio that is in some unresponsive mode. Currently it comes up in AM 1520 but none of the buttons have any affect on changing anything.
I have tried pulling the fuse and totally disconnecting all connections at the back with no luck.
It doesn't even come back in 'SAFE' mode after the power is turned off.
The only time I see any affect from the buttons is if I turn the radio on with some of them depressed. For example, I can hold the TP button down, switch on and get into GALA change mode, or I can press a couple at the end, switch on and I get "NO CD". Other than that it is unresponsive.
Anyone know what's wrong?

Mark.