My Sync 3 touchscreen stopped working over the weekend. It will only show a zoomed in map screen with my current location as I drive around and partially loaded maps. I can still use the steering wheel controls to change modes (AM, FM, XM, Bluetooth) but I can't anything else to happen.

I did the soft reset (Power button plus Next track) and the result is I just get a black screen. This goes away when I restart the truck and the map view returns. I've also disconnected the negative on my battery in hopes it will reset, but also did not work. I also tried pulling the fuse, which did nothing.

I have a service appointment scheduled for this weekend and I'm thinking the APIM might be bad or I just need to get the Sync update? Just thought I'd ask here for any thoughts before I go to the dealer. I can't even attempt to do a master reset as I can't access any of the menu functions.

I do have FORSCAN and can make mods to the AsBuilt. I had the Ford GT splash screen and read that it might have been the culprit. I changed the splash screen to something else and it still doesn't load. I can access the APIM module in FORSCAN, too.

Any other ideas? It's a 2017 Lariat with Sony sound system