ba wont start, battery fine, on the radio there is "code" nothing on the centre console works? any ideas?

Do all the usual checks such as fuses under the dash and in the engine bay,fusible links near the battery,dirty battery terminals,bad earths.And what do you mean by not start?Cranks over and won't run?Doesn't crank at all?Do you have dash warning lights and nothing happens when you turn the key to start?Let us know how you go?Kevman