TRX7 Device Troubleshooting. ← Knowledge Base Why won't my TRX7 power back on? Update Your TRX7 Operating System (OS). Assemble the TRX7 AC Adapter and Plug. Can I plug my TRX7 into my vehicle's head unit? Can I perform a factory reset on my TRX7? Why is my map update "skipping"? Reinstall Maps after a Factory Reset. Undo A Factory Reset. I lost my recorded tracks. How do I restore them? I'm getting a notification that says "Unfortunately, A-GPS has stopped." What should I do? I'm seeing a "Map Not Authenticated" notification. What should I do? My PC doesn't recognize my TRX7 when I connect via USB. What should I do? I want to talk to a live support person. Is there a number I can call?