Sync 3 not working, master reset didn't finish

[F150Chief]

You are stuck in a reboot or update loop where the system cannot find the files. You could try to run an update on the unit now, like 3.4.21265. Don’t know if this will work or not. Also, see this…

SYNC Hard and Soft/Master/Factory Resets, All SYNC Versions

SYNC Hard and Soft/Master/Factory Resets. All SYNC Versions. Types of Resets Soft Reset - Resets the module with no loss of settings or data - normal shutdown and restart. Hard Reset - Resets the module with no loss of settings or data - abrupt shutdown and restart. Master Reset - Resets the module back to factory defaults. To perform a Soft Reset Press and hold the Seek Up (>>|) button while pressing and holding the Radio Power button. After approximately 5 seconds the screen will go black…