Navman 90i, the screen turn to charging mode when power on
The screen change to charging mode as soon as the device is connected to outside power supply (car,main or computer) So while travelling, when the battery of the device is low and recharging, the map completely disappear from the screen and just showing the charging mode.
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Turn the Navman off by holding the power button in the upper left corner of the device until the screen goes blank.
Plug the unit into its charger using the USB port on the
bottom of the unit. The battery indicator light next to the power switch
should turn orange, indicating that the device is charging. Once the
light has turned green the charge is complete. If the light does not
turn on, verify that the car charger is plugged into a working outlet.
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.
I updated my Nuvi 40 with the latest software and it will not reboot into GPS mode with the usb cable connected. It used to work. I have figured out how to get it to charge with a standard USB cable: 1) Power it on.2) Press the battery icon for 8 seconds - it will enter TEST mode.3) Plug in your USB cable from the PC to the Nuvi - the screen will change to say charging.4) Press the power button 3 times rapidly - it will say Charging across the screen and it will go dim and then dark.5) To wake it up and use GPS mode while charging simply press the power button 3 times rapidly, again. Works Great!
You need to hold the power button for about 5 seconds to turn it on. If that does not turn it on. Then you need to run a check on some of the components of the device. You start with the battery, then charger and the device seem to be working fine, because when you plug it in, the device amber lights come on. It is supposed to turn green when it is fully charged, but it seems like the battery is not holding a charge, that is why it is not turning green.
Test another well charged battery inside the device to see if it will power on and work properly, if it does, then it means all you have to do is to replace the battery, but if it does not power it on, then it means there is an internal problem with the unit.
Try to connect it to a computer to see if it will detect it. Once it detects it, try to charge in on there for some time to see if it will hold a charge there.
If it is properly charged, it will be able to power on fully. Also check the device on the computer to see if the software and files are still on the unit. That should also assist you in solving the problem.
Open your usb cable with a sharp knife; you'll find four different coloured cables inside: leave the red and black cable intact; cut the other two. Close your cable with some tape.
Your navman won't go into usb mode again, but it will charge your device
It's not unusual to lose signal indoors , in fact most portable /car devices receive very little, if any, signal indoors.
I have a Navman ICN510 running TomTom 6.0 software , instead of the standard Navcar CE program. I believe it connects much faster.
Below is a support forum for modding Navman GPS units.
It will teach you how to change the software on your navman & also help with any other problems. It was very helpfull to me !! Click here for the Naman Forums !!!!