Re: ICS problem.
Hi Pete - welcome to the forum.
I may have a simple answer to your problem - have you tried pressing the 'DARK' key (on the RHS next of the screen itself) with the ignition on?
Alternatively, the settings might be all to ****, in which case you need to change the contrast, brightness etc.
Failing that, and this one's a long shot, the fuse for the ICS might have blown, in which case you need to identify which one relates to the system, then check to see if it has failed - if it has, a new one will set you back about 30p!!