Radio data display.

As a previous and grateful customer, I think it is great to have this new forum..thanks Ian.

1996 D2. 4.2Q. The radio is failing to shown details on the instrument panel.
The panel works fine on everything else and the top section operates on warnings etc so I assume it to be OK. Have checked wiring and data plugs etc but no success. Is this a common fault ? Is the radio likely to be the problem? This is not crucial, it's just nice to have evrything working.