[stevenkeyte]

The car is fitted with a hi-line set-up using an Alpine 6 CD changer unit fitted in the glove box.
When you remove and reinsert the CD cassette, the changer cycles through all 6 CDs as normal.
From the 'system menu' screen select 'Mode' button -> CD -> select button 1 you can hear the CD unit change to disc 1, the display then shows 'CD 1' a few seconds later the display changes to 'CD1 -01' then the display reverts to the system menu screen, never playing the CD.
All other audio functions work and the CDs are inserted correctly (i.e. the right way up!).
Any idea what's wrong with the system?

Steve