Radio-No-Go

[Max Hoepli]

Hi all,
Patient: 1986 Type 44 Turbo Quattro

Cranking my car, battery weak, Radio started to emit load beeps..beeps.
Battery was given boost, car started, radio L.C.D. display does not indicate
"CODE" when there is no electric supply to radio, L.C.D. is blank. Radio
does not turn on. Entering 5 digit code does nothing.
Radio/cassette player is original Audi Autobahn X 034 300 E model. 

What is solution?


Max