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Put it on the dashboard when it is acquiring signal, that helps it faster. If it locks up like that, disconnected the power for 20 seconds and then power it back on.
Make sure to flip your antenna horizontally or 90 degrees and not vertically or 180 dgrees. I see to many people try to use their older nuvi this way and it does not function well.
Try also updating your unit with the latest firmware from Garmin, this helps sometimes.
You may have moved to a location that is far away from the last location your Garmin nuvi 350 was last use, try to keep your unit on for 30 minutes or more to see if it will acquire GPS sattelites.
Last, certain vehicles have shielded windshields and GPS does not work well with these windshield, this can be eaisly verify by simply taking your nuvi 350 out of your vehicle and turn it on with a clear view to the sky, if that still does not work, it could be a defective GPS receiver or GPS connection in which case you should consider sending it in to Auto Nav 2000 Plus, Inc in San Jose CA or Garmin.
You may also consider replacing your nuvi 350 with a newer model nuvi with fresher map.
Power the GPS down for a spell, maybe an hour or two, overnight if possible. This will clear the memory and then power it up again, let it reboot. Make sure the GPS has a clear view of the sky or use an external antenna so the GPS can gather satellite data. Also do not press the buttons many times as this can confuse the GPS and make it "lock" up.
Unless you are driving in a dangerously remote area of some desert, or a large city, GPS units rarely lose signal. Chances are you have a defective unit, I'd contact Garmin support: Here.
Hope this has been of some help.
Form Message
You need to have Garmin Tech support send you this attachment; "gmapprom.unl" Then follow the instructions below.
1.)
Save the attachment from our message to the desktop
2.)
Right-click the file gmapprom.unl, and click copy
3.)
Click on My computer
4.)
Click on the Garmin Nuvi drive
5.)
Click on the Garmin Folder
6.)
Rightclick a blank white space in this Garmin folder
7.)
Click Paste, and note gmapprom.unl file is listed, please also delete
gmapsupp.img if present
8.)
Unplug the device, and allow to start up
How old is the gps, if you answer is more than 2 years could mean you have a bad antenna, i would look into purchasing the extended antenna from the manufacturer if its not too expensive to test that theory.
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