hi all recently purchased a range rover vouge 2006 with the harmon kardon logic 7 system. had it for about 6 weeks now well yesterday driving to work and as you all have probably read several posts like this my audio wants to die. phoned all the local audio guys around my area and no one wants to touch it due to the fibre optic system which was somthing new i learnt. so come to the conclusion on diagnosing this my self and you guys guessed it i dont have a fxxxxxg clue read a few places about how the fibre optic light works tried the over riding trick for the nokia hands free and it all works for around 16 seconds then just black out HELP PLEASE !!!!!!!!!