PRESTIGIO GeoVision 4700 BTFM - Инструкция (Страница 46)

EN-21
NOTE:
Immediately turn off the device and disconnect the power adapter if the
device is not working properly. Never try to repair the unit without
authorized professionals for it may damage the unit.
Troubleshooting
PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION
There is no
sound.
The volume may be turned
down or mute. Turn up the volume or turn
on the sound output.
Users can’t turn
on the unit.
The adaptor doesn’t
connect well. Connect the adaptor
correctly.
The built-in rechargeable
battery is weak.
Use the adaptor to supply
power or charge the
battery.
There is no
picture.
The brightness may be
turned down. Adjust the brightness of the
LCD.
The unit can’t
receive satellite
signals or can’t
orient.
The unit may be obstructed
by buildings or metal block.
Make sure to use the unit
out of room; if in the
vehicle, you can use the
external GPS antenna to
solve this problem.
EN