Many thanks for the prompt response.
If you can help further, that would be much appreciated.
I don't know how much you know about entering this code but now that I have got this far, I know that the display is gone. No light, no text from what I can see and no intention to fix it if I can get the radio to function (will be using mp3 player).
Now I know the radio works as I can here the CD changer boot up and I just tried blindly entering a code (could not for the life of me remember the exact code, went down to check the display) and it did beep at the end to it's wrong.
So, following the method, I know I use the scroll wheel on the wheel control to select each digit and the ¬ to progress. But any idea which way to turn the scroll wheel - up or down - to increase the digit from presumably zero as a starting point?