Did you check if it rebooted with only the Garmin folder on-board as suggest by catymag? She clearly meant for you to then add other files back later only if it does boot. 11/12/13x0 devices will boot with the file system completely empty but i'm not sure about 169x so best just add the Garmin folder only. If it still won't boot, reformat it properly with [Only registered and activated users can see links. ], add the Garmin folder and boot it. If then adding your backup files stops it from booting you have a corrupt or faulty file in your backup.