Intermittent nav and radio issues - LR2
 

I posted in the tech help section but no comments. I have an 08 LR2 and the nav, radio and some of the dash functions intermittently just go out. Typically happens at highway speeds. Sometimes they come back on after a couple of seconds but other times you have to turn off the vehicle and then they come back fine. Dealer has not been much help - apparently there are no error codes. Said might be related to loose or dirty connectors in dash... I remember reading about similar issues around loose connectors on this forum. Does anybody have any ideas or suggestions as to what could be causing this?