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To perform a Master Reset on the nuvi 200, 205, 465, 500, 600, 700, 705, 1100, 1200, 1300, 1400 or 1600 series device: Note: A masterreset will erase all waypoints or favorites and will restore your unit to the default factory settings. If you would like to back up your favorites you can find instructions to do so here.
Start with the unit OFF and unplugged from power
Touch and hold the lower right corner of the screen with an index finger or the eraser end of a pencil
Continue touching and holding the lower right hand corner of the screen then power the unit ON
Release the power button when the device powers ON
You will see a new message: Do you really want to erase all user data?
Remove your finger from the touchscreen when this message displays
The device will automatically reset. Follow the on screen prompts then place your device in an area with a clear view of the sky until it acquires satellites.
Usually a reset will fix this. Make sure it has a clear view of the sky and ful charge or on the charger. reset and let it download and install new catalogs. Then it should be able to restart normally and know where it is.
My garmin will idle after turning it on "aquiring satelites", after awhile it will give me the white screen "trouble tracking satelites, are you indoors now?" answer "no"when the garmin asks you if you are in a particular state answer "no". It works for me everytime, don't know why, just that it works to lie sometimes.
I have a 276C that has the same problem. Garmin has a unit with this
problem and is working on a solution. The problem is that the real time
clock loses time when the unit is turned off and disconnected from a
power source. As a result when you turn on the unit it thinks the
satelites are in a different orbit than where they actually are. The
unit will continue trying to aquire forever and not find the satelites.
You have to select "New Location" from the menu and select "Autolocate"
and the unit will start to look for any satelites in view. The unit
should get a fix within 15 minutes. This is a very frustrating problem
having to reset it every day. There is a new version of firmware (5.3).
I don't know if the problem has been fixed with this release.
same problem the acquiring satellites appears with a flashing '?' some where in central london 'horseguard', ......the unit switches on and off i have reset it used hard and soft reset methods.....updated the unit....same problem....