Reference; Troubleshooting - Mio Moov R503T 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.
114
Solutions
The remaining battery power may be too low to run your Mio. Charge the battery.
Make sure that your Mio is not running out of battery power. If the problem still
persists, reset your Mio.
Reset your Mio. (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 Mio 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 Mio. Connect the USB cable directly to your computer—do not run the
cable through a USB hub.
Reset your Mio before connecting the cable. Always disconnect your Mio before
you restart your computer.