Clio Radio Codes

[Krise]

Guys, hoping someone can help ?

The OH, clio (2000 W Reg) radio seems to have stopped working, the battery was disconnected and re connected, normally we just enter the radio code when requested however this time the screen just states 'CODE' and the option to enter a code is not there nor do any of the controls work.

Any ideas, or disconect and re connect battery ??

Thanks


Krise