I bought a cd43 from a Z3 from the wreckers, the display does not show anything but the red light is blinking, I have connected the wires # 9 (+12 volts) and 15 (ground). It can take in a CD and eject but it's not displaying anything.What could be wrong? It's BMW Business CD 6512 - 6 909 884 BP0273 1 9651756 FD041 Index 42
I hope this is enough info but if not plz let me knw. I need a code please.