Reference; Troubleshooting - Navman C40-Series User Manual

Reference

Troubleshooting

Note: If you encounter a problem you cannot solve, contact an authorised service center for assistance.
Problems
Power does not turn on when using
battery power.
Screen responds slowly.
Screen freezes.
Screen is hard to read.
Cannot establish a connection with a
computer.
Solutions
The remaining battery power may be too low to run your Navman. Charge the
battery.
Make sure that your Navman is not running out of battery power. If the problem
still persists, reset your Navman.
Reset your Navman. (See "Shutdown and hardware reset" for information.)
Make sure that the backlight of the display is set to a high-enough brightness.
Make sure that your Navman and your computer are both turned on before trying
to establish a connection.
Make sure that the cable is securely plugged into the USB port on your computer
and on the Navman. Connect the USB cable directly to your computer—do not
run the cable through a USB hub.
Reset your Navman before connecting the cable. Always disconnect your Navman
before you restart your computer.
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