I had the same exact problem. The solution had nothing to do with software. Apparently the connection on the Speaker-slash-12Volt DC Power Supply cable went bad. And apparently this is very common. (The location of that bad connection is the place where the cable connects with the GPS, that plug that you slide sideways to supply power to the GPS when you drive. The solution... purchase a new cable.
A friend helped me buy my original Garmin 2720 and he also immediately diagnosed the source of the problem when my power went out intermittently. He ordered a new replacement cable and all has worked fine since then. So this is NOT a software problem, it is a simple $40 accessory (hardware) problem. Just replace the cable with a new one.
What version of the firmware is loaded in your GPS? My 2720 was doing the same thing. It would reset itself every 2 or 3 minutes no matter what I did. I updated the firmware to the latest version from the Garmin web site (version 7.1 I think) and it works just fine now.
October 6, 2007
Same problem in Florida. I
have not used my 2720 in the last month, so I do not know when this could have actually started.
I was beginning to think I had a defective unit, but I guess there is something else happening with Garmin?
Would someone from Garmin respond to this problem??
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turn it off,hit the small "reset" button that is in a hole with a straightened out paperclip unless its a newer one thats not recessed.Then start it up by turning on,wait till it goes all the way through startup and see if thats fixed it,if not hit the reset while unit is on and in the home screen,again let it go through all startup as it may shut down and restart by itself. Then go online and update the firmware,its easy to do and will make it work like new.
The solution to this problem is for you to calibrate the screen. Before calibrating the screen, i will advice you reset the gps. To reset your device, hold down the power button for about 15 seconds, it will restart itself and power up fully, if the touch screen does not still work, then calibrating the screen will do the job for you. To calibrate the screen, follow the steps below:
Turn off your nuvi,
Hold the upper left corner of the screen, then turn on the nuvi,
Release the power key once the garmin screen appears,
Continue to hold the upper left corner of the screen for 30 seconds till a white screen with 'touch dots' appears,
Then follow the rest of the guide from there.
It might take a few tries before it works for you but you have to keep trying till you get it right. I am very certain that this will work for you.
You need to simply reset the gps device, that way it will restore the factory settings of your device, therefore, you will be able to enjoy your gps device. To reset, simply take out the battery and reinstall it back in or you hold your power button for about 15 seconds till it restarts itself, then it will work normally once again.
That should do the job.
Hope this information was helpful.
If your touch screen does not function, do not panic, it is a minor problem, The solution the the problem is for you to either reset your gps device or you calibrate the screen.
To reset the gps device,
Turn it off and on,
Then hold down the power button for about 15 seconds,
It will restart itself automatically,
Then the screen should be working now.
But if the screen does not still work, then you calibrate the screen.
Calibrating the screen will do the job. But note, you need to calibrate repeatedly till the screen works.If calibrating repeatedly does not do the job, then you ave to seek a technician because it is no longer a software problem but a hardware problem.
Since the touch screen is not working, what you have to do is to reset the device. To reset the device, turn it off and on to see if it does the job. If that does not do the job, then hold down the power off/on button for about 10 seconds, the device restarts, that way it should work, but if it does not still work, the only solution is for you to jeep calibrating the screen continuously till you get it done.
The proper process to calibrate your screen is for you to:
Turn off your nuvi,
press your finger on the upper left corner of the screen (that is before powering on),
While holding your finger on the touch screen, turn on the nuvi,
Continue to hold on to the touch screen with your finger for about 30 seconds or more till the white calibration screen comes on(white screen with touch dot),
Then follow the on screen information.
Try it several times till you get it to work. It does not just work the moment you try it, you have to try it over and over again.
I suspect that the power supply is not making a proper connection and comes loose in the socket, the gps unit then is forced to use battery power but since the battery is not fully charged yet when the battery power is to low the unit shuts down and will stay down till enough of a charge or the power supply gets bumped and makes a solid connection again.
Turn it on and let sit until it locates itself mine does the same thing only when moving down the road but when I stop it seems to work itself out and then works fine till I turn it on going down the road again