To update your nuvi, all you need to do is to connect your nuvi to an internet connected computer and the updates will show on the lower left of your computers screen, click on it and it will update it with the latest software version and maps.
You can also go to your nuvis website and search for latest updates. Just click on the map link and a list will pop up under the map link, select update maps if it is maps you want to update. It will ask you to choose your device from a list, after choosing your nuvi 255w then it will show you the latest maps for your gps, but you have to install its plug ins first.
That is how to update your gps.
Have you tried doing a hard reset,try using the reset button on the bottom of the gps under the serial label.Or try holding the turn off button for about 10 seconds,good luck.
of course ! but i didn't know the reset button,i only know there is some password recovery utilities you can have a try ,
check this out : unlock word password
Most GPS navigation devices from Garmin has a reset function which allows user to access a Maintenance Mode screen with system information, diagnostic details or perform the reset function to restore Garmin Nuvi or other series unit to its original default factory settings.
Depending on which model of Garmin GPS unit you're using, the following routine can reset the Garmin device to original factory loaded settings, or bring up the Maintenance Mode with access to System Information and View Diagnostics screen, where users can see various logs, and of course, clear all user data (reset to factory defaults) or clear Waypoints.
In order to reset Garmin device or enter into maintenance mode, perform one of the following procedures:
Power off Garmin unit. Press on continuously the upper top left corner of screen and then power on the unit by pressing once on the Power button. You should be prompted to clear all user data, or asked if do you really want to start up in maintenance mode. Press "Yes" to reset (warning: all data will be erased and lost, so backup before proceeding) or enter maintenance mode.
Hack above works on Garmin Nuvi 660, 680 series.
Turn off Garmin device. Press down on bottom right corner of the touchscreen, and then power on the GPS unit. You should be prompted whether do you really want to erase all user data, or asked if do you really want to start up in maintenance mode. Press "Yes" to reset (warning: all data will be erased and lost, so backup before proceeding) or enter maintenance mode.
Trick above works on Garmin nuvi 200, 250, 360 750, 760 series unit. In fact, there is a video demo by user of Garmin Nuvi 360 on how to perform the hidden reset function.
Hope helps. (remember to rate and comment this answer).
there is a fuse in the cigarette lighter plug if not that check the fuse panel for cig terminal when you were wigling you may have shorted the fuse there and possibly both. good luck
I have a Garmin 255 myself. And what I have found is, MOST of the time, the problem is that the CHARGER CABLE has an intermittent connection in it! So, when the cable moves, flexes, or stretches, the battery charge STOPS, and the (mostly discharged) battery cannot support the load, so the unit blacks out and turns off. Try S-L-O-W-L-Y moving the cable while connected with the unit on, and watch for evidence of a bad cable! Sometimes a DIRTY (trapezoid- shaped) connector will do the same thing!
