Garmin sent us a replacement colorado 300 but now it wont load the maps from the sd card card from the previous colorado ! any help out there ?

The latest version of Garmin Express provides the ability to install a map update directly to an SD card.
The SD card installation option will only appear when updating a compatible device that does not have sufficient internal memory for the largest allowable map region. When using the SD card installation option, critical files are loaded to the SD card so it must remain in the device after the update to ensure full functionality. For the largest size SD card a device can use, refer to: What is the largest size Secure Digital (SD) card that an automotive device can accept?
The SD card support during the map update will only function with up-to-date software. It may be necessary to update the device's software with Garmin Express prior to updating the maps. These devices do not support the SD card option:

• Nissan 700
• nuvi 295
• nuvi 300 series
• nuvi 500 series
• nuvi 600 series
• nuvi 800 series
• nuvi 805 series
• nuvi 5000
• StreetPilot series
• zumo 450
• zumo 550
• zumo 665

For devices that do not support using the SD card with the map update application, any maps that do not fit in the internal memory can be installed to the SD card manually, using these instructions:

Try the link.it may help.Under support.
Garmin United States Home

Hi, It seems to be backup battery on PCB. You have to replace it. It is very frequent defect for CO which was made, same battery there were used by Garmin was defect - shorter life time. Jean

Hi, if is original packing, you have to use Garmin SW - MapSource. you have to deblock your map for use. Jean

If the maps are deleted they are gone! Contact Garmin and ask them to replace the maps. There is no way of resetting deleted maps.

Hi,
Hope this helps!

I wanted to add maps to my 250W. I found the maps I wanted on a Torrent. However, many searches around various forums never revealed how to install these. Found the following through reading and experimentation.

1. Downoaded map image file GMAPSUPP.IMG. Download also gave me "Use code XXX when generating unlock code for maps"
2. Downloaded Garmin Unlock Generator 1.3 by JetMouse
3. Looked on my GPS to find the UnitID
4. Entered the UnitID into Garmin Unlock Generator. Ignore the GM XT device unlock code and the top Generate button.
5. Selected Map Product as Custom and entered the code given for the downloaded image file.
6. Hit the bottom create button to generate a 25 digit code.
7. Download Img2Gps and run
8. Click Load Folder to load the image file. Select the tick next to it.
9. Check the Use Unlock Key option and paste the 25 digit code in.
10. Load a blank SD card into your Garmin
11. Connect the Garmin to your PC using a USB cable. You should see two dirves in windows: one is the Garmin and the other is the "Removable Disk" SD card.
12. Create a folder called "Garmin" on the SD card
13. Select Folder/Card in Img2GPS
14. Click "Copy Maps". Select the folder /Garmin on the SD card. You may need to click copy again.
15. Upload will take a while.
16. You should now see a file GMAPSUPP.IMG on the SD card in the /Garmin directory.
17. Create a new text file called GMAPSUPP.UNL in the same directory (make sure it does not have a hidden .txt extension).
18 copy the 25 digit unlock key into this file.
19. Close the file.
20. Disconnect the Garmin.
21. On Startup it should load your original maps and the new ones.

No. They are refering to maps sent from the computer to the Garmin device. Maps are not transferred off the SD card to the unit. Simply insert the SD card into the device and the Garmin will read the maps from the card.
to double check follow these steps

1. Power on the unit with the card in
2. Press Tools
3. Press Settings
4. Press Map
5. Press Info (or map info)

This page should list out both your UK and Ireland maps(old as dirt) and your new Benelux and France maps as well

it is in the box it came with, on the back of the instruction book.
If you did not buy it 'new in the box', you will have to refer to the 'activation' code sent to you email.
The Garmin Nuvi 760 does not require SD card maps if you are using it in the US, btw...
-d

sounds like the system might need a update on the software

i had a simalar problem -i asked for an update off garmin and they sent me a disc with apdated maps but didnt tell me i had to first delete the loaded maps you will have to go on the garmin website and order the FREE update disc for uk and ireland and just follow the instructions when you recieve it hope it works for you ;>)

The Garmin C340 comes preloaded with maps while the I3 require that the maps be installed onto a micro sd card.

You can place the micro SD card into a SD adapter and use a regular card reader to download your maps. When the software ask for 'Device' to download to use the drop down arrow and find your drive letter associated with the card reader. Using a card reader will be much faster since the it is ubs 2.0 vs ubs 1.1

You could also go to Garmin website and download and install the USB drivers, see link below.

http://www8.garmin.com/support/agree.jsp?id=591