How do I perform a Master Reset on my GPSMAP 78, 78s, or 78sc?

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05/20/2013

There are a few instances in which you may want to perform a master reset on your GPSMAP 78, 78s, or 78sc, including the following:

  • not receiving a satellite signal
  • restoring the factory default settings
  • not functioning properly

Performing a master reset can cause data loss. To back up user data* utilize the FAQ “How do I back up user data from my outdoor GPS with a USB interface?". If removing user data is desired to eliminate corrupt data or free up additional space, reference the FAQ “Why does my Garmin outdoor or fitness GPS still show my GPS data after a master reset?”.

To perform a master reset:

  1. Ensure the device is powered off
  2. Press and hold Page and Enter simultaneously
  3. Power on the GPS while continue to press both buttons
    • NOTE: Immediately release the power button once the GPS powers on
  4. Release on the buttons once the Do you really want to erase all user data? message appears
  5. Select Yes

The GPSMAP 78, 78s, or 78sc is now reset. You will want to leave the device outside with a clear view of the sky for a minimum of 20 minutes to acquire satellite data.

*User data consists of waypoints, routes, tracks, and geocaches

Referenced Link(s):

How do I backup user data from my outdoor GPS with a USB interface?: https://support.garmin.com/support/searchSupport/case.faces?caseId={7fdc4230-f13b-11df-ea12-000000000000}

Why does my Garmin outdoor or fitness GPS still show my GPS data after a master reset?: https://support.garmin.com/support/searchSupport/case.faces?caseId={60eb9630-b51f-11df-55a0-000000000000}




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