Megane mk3 with built in Tom Tom inop

Chazlad1970 Registered Users Posts: 1
New Seeker

My Megane 2011 with built in Tom Tom which was working fine until recently just decided to stop working. It boots up to the first screen with the legal jargon with yes/no options at the bottom but the navigation buttons don't respond.
I have tried updating my SD card on the software and recently purchased the updated maps and downloaded fine but I still have the same issue.
Are the navigation buttons meant to illuminate when your lights are on or am I just thinking navigation is faulty.