Technical 1998 2.0 Ulysse Odometer problem

[valhalladvae]

Hi folks its my 1st post here and i was just hoping for a bit of advice, i have had the car for approx 5 months with no problems until today when the odometer went off, all of the other things on the dash work still.
Does anybody know which fuse it could be or how to replace the bulb if its only that??
Or does anybody have any other ideas as to what the problem could be??

Cheers
Dave