Locate the reset button, located on the back of the device, in the lower left corner. Remove the sticker covering the button, and use a straightened paper clip to depress the tab.
To reinstall maps
Connect your Garmin Nuvi to your computer via USB cable. You can only update the maps through connecting to your computer.
Open the "myGarmin" website and sign in with your Garmin account. Make sure to sign in with the account that you've purchased the map updates on.
heres a link to the site;
Click the "myMaps" tab on the myGamrin dashboard. This will load a list of all of your purchased map upgrades.
Click the drop-down menu in the "Recent Map Purchases" section. Select your Garmin Nuvi from the list of devices.
Install the Garmin Communicator Plugin when prompted. This is required in order for the Garmin website to transfer the map files to your Gamrin software on your computer.
Download and install Garmin Express. This is the program that allows your computer to interact with your Garmin Nuvi.
Register your device in Garmin Express. If you haven't already registered your device, you'll be prompted to when you start Garmin Express. You'll need to register in order to update the maps.
Click the "Updates" tab in Garmin Express. This will show all of the available updates for your Nuvi, including the new map update you just purchased.
Click the "Show Details" option next to your Map Update. Click the "Install" button that appears. You will need to accept the agreement before the update installs.
Wait for the maps to download and install. Once you agree to the terms, the map update will begin downloading to Garmin Express, and will then be transferred to your Nuvi. This will likely take several minutes to complete.
Close Garmin Express and unplug the Nuvi when the update is complete. The Nuvi will reboot and begin installing the updated software on the device. This may take another couple of minutes.
If you weren't automatically prompted to install Garmin Express, you can download it from