I have an AVIC Z130 that I upgraded to Z140. Now when I do not have a destination set in the Navi no roads are displayed. I see a map and the GPS function seems to work fine, but no roads are displayed on the screen. If I set a destination then the Navi show the roads? Any ideas? I don't remember this being an issue before I upgraded to the Z140.
I there anyway to downgrade the software back to the Z130? Can I manually install the software through "File Maintenance" or some other way? Is there away to reinstall the Z140 upgrade?