Blaupunkt IDC A09 5 Disc changer Fault

[GreenStilo]

Hi
I have problem that Disk was playing OK intermittently it would stop with Display showing "CHECK DISC" + all five eject buttons on changer flashing red.
it was playing OK yesterday in slot 1, I put a disc in slot 2 and Check Disc is now on permanent when CD changer is selected from head Unit and all 5 eject buttons flashing red.

Anybody else been able to repair this fault