Garmin 750 cant unlock maps

Have you ever had it Registered?
If not you have to before any maps are loaded...... with the unit off connect the GPS to your computer using the USB connector cable...(its the same usb connection a camera uses connecting to a computer)..
Once your computer detects your GPS it will say new hardware found
go to www.MyGarmin.com and Register your unit
Garmin will also detect your model number and let you unlock the maps and firmware
FYI where you set up the GPS will be your SECURITY LOCATION if you ever lose your pin number you would have to travel back to the security location to unlock your unit

I've been trawling for unanswered questions; this information may be too late for you (or perhaps it may help you resurrect a useless machine which you have put away) but it will certainly help others searching for advice with the same problem.

You have Garmin Lock activated on your nuvi: there are only two ways you can unlock it.

1. Enter the PIN code (but you clearly don't have it or you wouldn't be reading this).

2. Take the unit to the Security Location you chose when activating Garmin Lock: it will then unlock without the PIN code and you can then either reset the PIN or disable Garmin Lock. The Security Location should not be the owner's home address, but many owners ignore this recommendation. Many owners choose their workplace or a close friend or relatives address for this purpose.

If neither option works then your unit is useless unless you send it to Garmin with proof of purchase. Garmin charge for the service and if your maps are not up to date then it's really a waste of money as the investment would be better spent on a new unit with current mapping.

I hope that you manage to either fix your problem using my advice or at least can decide whether to abandon the unit and buy another.

This means that you are missing the unlock code to unlock the map on your unit. did you just recently try to upgrade the map?

Please see this link:

http://www.sharc.net/gps_lost_map.htm


- Jim

If they are truly gone you'll have to buy them from Garmin. I would suggest to buy the Life Time update. That's what I did. Maybe it's just a software issue?? Get the free WEBUPDATER from Garmin here:


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After installing WebUpdater once from the Garmin website, perform all future software updates from your computer. Simply connect your compatible Garmin device to your computer, then run WebUpdater from your computer's "Start Menu" by selecting "Start", "Programs", "Garmin", and finally "WebUpdater"
REMEMBER: It takes hours to do a complete a map update.
Unless you bought the Lifetime maps you may have to pay for current maps.
Does this help? Let us know. Thanks.

Hi,

Follow this below


Go to your account at garmin that you created to manage your maps.

Click myMaps

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


Regards
Richard.

Hi,
First check please, tools, maps, map info,
in here are all your stored maps, tick the boxes, if they are there.
You may need the serial number ( on the sticker )
and unit I.D. tools,settings,system, about,

If not then follow the procedure below. to load them from your account at Garmin.

So, Go to your account at garmin that you created to manage your maps.

Click myMaps

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
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
Hope this helps
Regards
Richard.

There is a serial number associated with your maps and your GPS unit. You will be able to get this serial number from Garmin when you register your software. Mapsource comes with the maps on the same disc. If it is not installed on your computer, it will automatically install.

i BOUGHT A QUEST ON E-BAY, WHEN I TURN IT ON AT THE BOTTOM OF THE SCREEN, " CAN NOT UNLOCK MAPS" HOW CAN i UNLOCK THIS UNIT SO I CAN PROGRAM IN CITIES AND STATES.......

Buy your map updates from Garmin, and Garmin alone.... then you can call on their excellent full customer support. They even supply you with an unlock code when you purchase maps direct from them as part of the deal. (these numbers will be recorded with Garmin, so contact them if you lost yours).
If you download maps from 'shady' sites, you get shady programs too.
Some maps downloaded have been found containing trojans to send details of your linked bluetooth products (phone details, computer details)

Hope this helps.

Garmin rep.