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.