Hi guys (and gals and non other specific genders)this is my first time posting.
I have a disco 4 lux and the tv screen behind the the drivers seat has stopped working. Any suggestions to what I can look for or try before I send to a garage.

cheers

Welcome to the zoo. Not my field of expertise but check out if any loose connection under seat

+1 - will most likely just be like any other AV system... I have RSE, but touch wood it hasn't really gone wrong... you'll have plugs in the screen, and in the back of the unit, and long AV cables running between the two/ up the seat back. If it was a factory fit then you shd be able to use the Electronic troubleshooting manual/ wiring Diagram to locate the connectors/ identify the problem. Maybe also switch screens to be sure that your RH screen works?