Advanced 5500: GPS INTEGRITY SVN: GNAV1

[Aseweepay]

Hey Guys,

I recently purchased a plane with an Advanced 5500 and a Garmin GNS480W. I have a “GPS INTEGRITY SVN:GNAV1” showing on my Advanced EFIS page and “GPS INTEGRITY” on my moving map on the Advanced display. The moving map on the Advanced also shows me at the previous owner’s location (never moves) regardless of my true location. I’m currently working with Jonathon on this problem, but does anyone else have any suggestions or dealt with this before ? Thanks in advance.