Question about Garmin GPSMAP 276C GPS Receiver

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GPS wont boot up

I bought a new Garmin GPSMAP 178C Sounder back in 2005.I finaly got around to change out my older GPS and Fishfinder. However after I hooked up this new GPS all I got was a gray screen. I read the manual and the wires are all hooked up properly. Do I need a card with this model. I was of the understanding that the Eastern Sea Board was pre loaded. Please help Thanks Tom

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When I pressed PAGE or OUT IN or Quit the unit shuts off , but when I pressed QUIT when turning unit ON my problem was solved. but every route waypoints track were wiped out. Thats OK since I did back them up when the unit was OK. thank you both (The Oger and lostchild )

Posted on Apr 08, 2008

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Use with caution: This will delete your user data on the unit.

Try a reset:

  • Hold QUIT pressed when turning unit ON (will delete waypoints, routes and tracklogs)
(This worked for me when I had a similar problem.)

You could try a master reset;
  • Hold Zoom-OUT + QUIT + NAV and power ON. Hold keys for 10-12 seconds.
  • You lose all almanac and temperature compensation tables (it reconstructs itself but takes time - several hours)
  • Be patient - it will take HOURS for the unit to recover
Fair warning: I have not personally tried the master reset.

Posted on Dec 16, 2007

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Posted on Jan 02, 2017

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