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Your Garmin GPS has an internal memory or an SD-card that contains an "operating system" and "map data".The operating system is like windows or Mac OSX. It contains the menu and everything the GPS displays. The "map data" is a digital roadmap the GPS uses to calculate your route. If the map data was on a SD-card that was inserted in your GPS, it could me that you lost the SD-card. That could be the reason your GPS can't find the map data. Sometimes it happens that when people connect their GPS to a computer to update the "operating system" of the GPS something goes wrong. For example, when you disconnect your GPS from the computer while the update software is still writing data to your device, the connection gets lost and you're left with corrupt files on the GPS. It could also be a defect in the internal memory of the GPS. I suggest you try to update the operating system with a program called "Garmin Express" (just google and easy find it). You need to connect the GPS to your computer with a USB cable. Then you can perform an update. I hope it helps to solve your problem. What you could also try is to soft reset your GPS. To do that, you need to remove the silver or blue frame around the screen of the GPS (it pops off). Behind this border there is a reset button. If the map data is completely gone, and you don't have a backup there is only one solution: Buy the latest map for your GPS online and download it to your GPS. It's expensive. In that case it's better to buy a new device in a shop. Most new devices contain Lifetime online map updates (model name nuvi -then the number - LM or LMT) (LM= Lifetime Mapupdates T= Traffic information) Then you can update your map data every three months if you want.
Question: What should I do if my Garmin nuvi or zumo displays the message "No Detailed Maps Found That Support Routing" or "No Map Data Available?"
The "No Detailed Maps Found That Support Routing" or "No Map Data Available" message may appear on your device for the following reasons:
The GPS device is missing it's unlock code
The maps on the GPS device have been disabled
To determine the cause of the message, touch the screen until the message "No Detailed Maps Found That Support Routing" disappears.
If you see a "Can't Unlock Maps" message following this error, remove any microSD / SD cards in the device and follow the instructions below for Retrieving your unlock codes followed by the instructions for Creating an unlock file
If you do not get the Can't Unlock Maps message then skip to the instructions for Enabling maps on the GPS device
You do not give very much information to go on.
Perhaps you have downloaded some data such as routing or some other details from your computer via "MapSource". If so AND you have a mini SD card in the GPS, you have overwritten the SD card with the data from MapSource ...the map data on the SD card is now gone!
But the MapSource Data remains.
If you have copied the original data on the SD card, just copy and paste to re-place it.
If NOT you will need to contact Garmin to get a new SD data card.
What you have to do to prevent this in the future is to temporarily remove the Data Card from the Garmin GPS, then download the MapSource data from your computer. Then the MapSource Data goes to the GPS on-board memory.
Have you checked the wrench menu, map info, the preinstalled map should have a check mark, if not tap on the check box, it should now show a detailed map screen when you go back to the main menu and select show map.
Hi - I have the same model GPS but I've been unable to locate a copy of the CDs and I'd love to get a copy of them - would that be possible? My email address is email@example.com.
As far as re-installing he maps, here's what I've found. I think this might help: Locate
the files that are loaded on the computer.Magellan Roadmate Manager
example: C:\Program Files\Magellan\Magellan RoadMate Manager
NA\Map\Basemaps Copy all files. Make sure your Roadmate is connected
and click on Example E:/Removable Disk and paste them with other files.
It takes a few seconds to 1 minute to transfer the 25.5 mb file so
don't unplug it until it is finished.