Question about Garmin GPSMAP 392 GPS Receiver

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I have a marine unit model 392. it won't turn on. i confirmed that it has power bit it does not turn on. it worked last season and was stored in a dry environment in my home. help please

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  • marshman99 Jun 03, 2010

    I have a Garmin GPSMAP model 498 GPS/chartplotter. This unit worked last season but when I put it in this year, it won't turn on. I have confirmed that there is power getting to the unit. Do you have any thoughts on what to do? I wrote to one of the other experts who told me to press the reset button but there is no reset button. Help, please. Thanks.

  • marshman99 Jun 05, 2010

    I have a Garmin GPSMAP 498 chartplotter. This is a gps, depthfinder, chartplotter for use on a BOAT. It worked last season and now will not turn on. I have confirmed that there is power going to the unit, but it won't go on. THIS IS NOT A GPS FOR USE IN A CAR, so please dod not respond with information about those units. Also, I do not see an external reset button.


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My new 392 gpsmap will not show the correct mph.?????

Posted on Aug 29, 2010

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Hi! The board of the unit may just be dirty. Try blowing compressed air to clear out the dirt on the board. This can resolve the problem. Hope this helps and have a good one!

Posted on Jun 05, 2010

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Thanks for contacting

Try to hold reset and then press power to reset software. This would reset the unit and restart.

Let us know if you have something more to know else please accept the suggestion.

Thank You.

Posted on May 31, 2010

  • marshman99 Jun 01, 2010

    my bad. the model that i have is the GPSMAP 498 and I don't see a reset button. thoughts?


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Getting stuck on the flashing Garmin logo, or a message about not finding any maps, are indications that the firmware / system software inside your GPS has been corrupted.

There are three steps to take to get your Nuvi 265W running like new:

  1. Back up your Favorites.
  2. Perform a Hard Reset.
  3. Download and then run Garmin WebUpdater to replace its firmware / system software.

Posted on Jun 03, 2010

  • Catalin Turcu
    Catalin Turcu Jun 03, 2010

    try first to reset from a button that should be hidden for protection on a side womewhere in a hole that fits a pin or a ballpoint tip..also may try remove power and battery todo that ..sometimes it is enough ..if not read the post on the links see how to do the hard reset needs connected to the computer ...and download that tool to connect after that you will have to log inand see the right firmware for your exact is available on their support site...Remember that will mess up the presets ..and you will have to set it again like you need..


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