20 Most Recent Garmin GPSMAP-640 GPS Receiver Questions & Answers

i would try a direct drag n drop or copy/paste via the file explorer. first check to see if the files are indeed in the corresponding folder on the 640. if they are then look for a setting on the 640.

What does it say on the blank satellite screen? Does it say "GPS is OFF"? Are you indoors when this is happening? Mine is working fine.

It could be that the unit is in the "GPS OFF" mode. Get into the main menu--go to "Set Up" hit "Enter" --go "System" and under GPS , see what it says. It should be "normal." If not, press "enter" and you should see the different options. Set to "normal."

I had a similar issue once. Something happened to the MicroSD card. I pulled the card out and started the unit. It worked. When I put the card back, same thing happened. I then formatted the card on my PC with a card reader, put it back in the unit and reloaded my maps and custom waypoints. All has worked perfectly since then.

also should try different batteries ?Have you gone to the Garmin website and looked for updates? Install their webupdater and let it check your unit. And have you tried to restore the default settings

these steps will help you diagnose and solve your problem

Better if u connect it through FM tuner on your car radio

yes, you need the NMEA out cord set for the E 80 and hook the output of the E series to the input on the power data cord on the Garmin - out to in

Have a look on their web site; https://static.garmincdn.com/pumac/GPSMAP_78_OM_EN.pdf&vssid=collectionitem-web-desktophttps://static.garmincdn.com/pumac/GPSMAP_78_OM_EN.pdf

I suggest you try resetting the device by following the instructions in the owner's manual. If the issue persists, it may be due to an error in the map database. You can try reinstalling the maps to the memory card after unlocking them for your device. If you are still experiencing issues, please contact Garmin Product Support for further assistance . Correcting the Message "Can't Unlock Maps" or "Can't Authenticate Maps" on a Garmin Automotive Device ' Garmin Customer Support

By 'resetting' you mean it switches off, and because it is connected to power, it boots back up. Do you have a SD Card in it? I had trouble with a Nuvi 1350 with SD Card that had the whole USA Map on it, mine came with the Canada Map only. It would randomly turn off, so I decided to buy a Factory Refurbished Drive 50. I removed the SD Card and Reset the Nuvi and it worked perfectly after that. The Drive 50 was also a bit flaky, and resetting fixed that as well. You can back up your Favourites beforehand.

I recently purchased a Garmin GPSMAP 78s I had a lot of trouble calibrating the compass; I literally tried it hundreds of times without success. I also did a hard reset etc etc. Believe me I definitely tried everything possible but to no avail I did contact Garmin but they didn't have an answer straight away for the problem I have now sorted it as follows: Do each step VERY SLOWLY, MUCH slower than you think you should There are three steps to go through in calibrating the compass 1)Spinning the whole unit around flat 2)Flipping it over longitudinally and then 3) Flipping it over end to end. But remember do each step VERY slowly and go to the next step when prompted by the unit This solved my issue. I can now calibrate my compass 9 out of 10 attempts Hope that helps

To open the MTP settings on your Garmin Nuvi 50LM, you will need to access the device's menu. From the main menu, select the "Settings" option and then select the "System" option. From there, you should be able to access the MTP settings. If you are still unable to access the settings, you may need to contact the manufacturer for assistance.

You will need to go to the Garmin website on your computer or laptop and set up an account. I think the sign up is free. You will then need to connect your Garmin to the computer and update it that way.

Hi Earl, Sometime it could just be of aging. I have a 130, it was having similar problems, until i realized it was the screen not showing, but power on turning on. In your case, I probably probably try a hard factory reset as follows: To perform a master reset:

1. Turn off the device.
2. Press the PAGE, ENTER2, and POWER buttons simultaneously.
3. Release all buttons once the Do you really want to erase all user data? message appears.
4. Select Yes.

hope this helps! Kevin

It appears to be a known issue. You can try some Electrical Switch and Contact Cleaner in the first instance. This NOT WD40. https://www.google.com/search?q=Garmin+etrex+10+click+stick+problem ..

notify garmin for assistance

Normally you plug GPS into your computer and download map updates from Garmin website, I will post links below with Garmin instructions,manual,and software. press the helpful button nvi 2797 LMT Garmin garmin satnav hidden secret Installing microSD card Mapping on the Garmin nuvi 2797LMT and nuvi 2757LM Garmin nvi 2797LMT 7 Inch Portable Bluetooth Vehicle GPS with Lifetime...

Torq 4 or 5 normally.

Download and install Garmin Express from Garmin. Plug your GPS into your computer. The software will identify your GPS and allow you to register it, as well as provide any current updates.

Press the "reset" button to rest the unit....