Question about Garmin GPSMAP-640 GPS Receiver
Says "cannot unlock maps" and "no detailed automotive maps found"
Posted by Anonymous on
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Posted on Jan 02, 2017
From the Garmin web site:
Question: What should I do if my Garmin nuvi / zumo displays the message “No Detailed Maps That Support Autorouting.”?
Answer: Please follow these steps to troubleshoot the error message:
Checking the unit:
Posted on Jun 29, 2008
I had the same problem. What you do is place your finger in the lower right corner where the green button would be and cut it on. When the prompt comes up, click yes. when the no detailed maps comes up again, hold down the green button again. You should then be able to upload the maps.
Posted on Mar 21, 2009
I am very sorry to hear that you are having problems with the unit. You
may need to switch the unit on and press and hold the centre of the
screen until the message ?No detailed maps? message disappears.
If your map detail is missing, then the map information may have been
disabled. To check to see if the mapping has been disabled, follow the
From the Where to? and View Map page, touch the Spanner icon, settings
Touch Map Info.
The unit should display the name of the map that is loaded to the unit.
The box in front of the map name should have a tick in it. If it does
not, touch the box to place a tick in it.
Then please test by searching for an address.
Posted on Apr 02, 2009
Go to your account at garmin that you created to manage your maps.
Click Manage Maps
You should see your unit and it’s unlock codes
Copy all the unlock codes for your device
Close your internet browser
Right click on your desktop
Click new, and then click a new Text Document
Click on the newly created Text Document icon from the desktop
Type your unlock codes into the document
Click File and Save as
Change the file name to gmapprom.unl (( double check this please ))
Change the “Save as type” to "All files"
Close the document
You should see the file gmapprom.unl on your desktop
Right click on the gmapprom.unl file and then click copy
Plug your Garmin device in and then click Computer/ My Computer
Click on the nüvi drive
Right click on the Garmin folder and click paste
Safely disconnect your Garmin device from the computer
this resolves the problem for you.
Posted on May 19, 2009
You can download new maps..........free......................but..........
I had this problem last year with my garmin 200 and when I called they said that I was out of the 60 day time window for a free map upgrade but they would give it to me anyway. They gave me detailed instructions on how to download a new map free of charge but they didnt explain which selection replaced what I already had on mine.
As a result, I downloaded the wrong maps and have much less detail. Even though its the "2009" version, its less acurate than my old maps were. But its worth a shot, better than paying for them.
Posted on Jun 20, 2009
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