XK8 RADIO not working put in code

hello my car 1996 xk8 coupe.
car not in use at the moment,working on it.i have a Battery Cut Off Kill Switch on it.
i drive out of garage,turn battery on then put in radio code,on comes the music to work to.always works,yesterday did the usual…no radio.electric aerial goes up ok.checked fuses,all ok.
any ideas anyone please.
ps.forgot to say i have not done any work near radio that i would have interfered with radio working.