I lent the navman out they said they simply plugged the navman f20 to the computor to charge it. now turning it on it shows the navman screen then in bottom corner shows karten werden gelaten World Outline (v4.00) than goes to language. i then push on english and then goes to basic set up ,voices, kms, times.then safty/securitytutorial 1/15, goes through that then goes no mapdata availiable. all this is over about 30 minutes.really apreciate all help

screen shows computer to navman all the time

The F20 Desktop Software and Service pack on the CD's from navman do not work, as you have seen. The solution is to go to the navman website and download this Service Pack

Be sure your f20 is connected to the USB cable and turned on displaying the USB Connection screen. Leave it on during the entire process.

Once downloaded, run this self extracting file and let it install automatically. After it is installed and ran.....you will see the same error again of failure to connect.

At this point you must reinstall the driver manually. Right click on your "My Computer icon, Select Devices, then properties on the navman. You should see a yellow "?" next to a statement "Unknown Device" in the USB devices. Click on the "Reinstall Driver" and select a specific location or the Have Disk button. The USB driver is now located in C:\program files\Navman\f20servicepack\USB directory.

You should get a button that now says Okay at the bottom, click onto it and allow the MS program to update the drivers. You should see the device screen change and say "This device is operating properly". You can then close the windows and run the F20 desktop program. It should connect then.

The battery drained off completely for a while probably it is damaged, you need a new battery

any store that sells Navman GPS should be able to accept the repair. It wont be cheap though


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If its showing a white battery with a cross then its not charging. Try using the car charger and see if it shows a battery without the cross.

Probably the plug on the navman has suffered what we call dry solder joints from inserting and pulling out the charger you need a tech to fix it. soldering is nesessary shouldnt be too expensive I fixed mine its about half an hours work if not too damaged inside

mine won't charge either!

my navman f20 has lost its sound

The problem is that most of the chargers have the output of 5V/0.5A. The charger for NAVMAN (C30 in my case) has 5V/1A. And that is causing the trouble. The GPS is undercharged and is switching off itself. Buy one which specify the output power: 5V/1A. Hope I solved your problem

Try cleaning the contacts on your b2 with a contact cleaner, could be that simple.