Single Status Update
I've been pointed in your direction by another member.
My B9004 head unit is very similar to the TNS 510 & is showing an identical contact your dealer message after I disconnected the battery.
I've read you other posts but my problem is the B9004 doesn't have an SD slot, only DVD & CD. The original maps DVD remains inside.
The satnav packed up a while ago but I still getting radio & phone capability. Any ideas on how I can get these back?