[camson66]

Thanks all. for your comments.

I will be in touch with the Garage to check it out.
I think its the Symphony head unit,
There is no red light on boot unit but it will accept disc,
Cant find any mention of fuses in handbook, for Satnav at all.
I'll check it all out,to make sure head unit has power.
Is the head unit easy to get out ?

Thanks All, for your kind help.

John