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Hello there: please follow these instruction and this should help if not let me know and i willcontinue to get you more information for you nstructions
the screen of the Garmin StreetPilot C340. If the touch screen does not
seem to respond when you hit it with your finger or a stylus, you may
need to calibrate it. To do this, turn the unit off and then hold down
the "Power" key for approximately one minute. You will see a
calibration screen come up that will recalibrate the GPS unit.
the Garmin StreetPilot C340. If your GPS unit is not responding or is
stuck on a particular screen, it may need to be reset in order to
operate. To reset, remove the face plate of the unit by gently prying
it off. Locate the "Reset" button under the face plate and press down
in order to restart the device.
the fuse of the Garmin StreetPilot C340. If the fuse blows on the GPS,
you will need to make a replacement using an ACG/3AG 2 amp fuse.
Unscrew the adapter cord at the end and remove the fuse found there.
Put in the new fuse to see if this returns function to the unit.
the software for your Garmin StreetPilot C340. If the GPS is not
providing you with correct directional information, you may need to
update the software or download new maps onto the device. Connect the
Garmin StreetPilot C340 with the USB cord to your PC and log on the Garmin website for available updates.
The only way you can be assured that your map update was successful is to check the version.
1) On your main screen, you'll have a little wrench tool, click on it.
2) On the next screen, go to the "Map" icon.
3) Next screen, click on the "Map Info"
4) Last screen you'll see the maps isntalled and the year.
Try using a different website where you can download the maps for free. These should work. If they don't, you might need a software update from the same web site before getting more maps: www8.garmin.com/support/collection.jsp?product=010-00401-20
I just spoke with Garmin and they walked me through correcting the problem - very helpful. It is a matter of resetting the unit. Turn unit off, then press a finger tightly against the bottom right hand corner of screen, holding it while turning unit on. When screen comes up, let go of power button but still pressing bottom right hand corner of screen, answer question regarding deleting defaults. It is tricky and may have to be done a couple times. Then you will answer questions regarding time zones, etc. When finished with this, turn unit off and go outside in order for the unit to re-aquire satellites. When all four bars on upper right hand corner turn green, you're back in business - or at least it worked for me. Hopefully this will help, but you may want to call Garmin as they are really helpful and can explain it better than I can. Good luck!