M3 Series Hardware Manual
Page 22
... 21 If the problems still exist, please cut off and on again to reset using Reset button on rear. Troubleshooting Problem Possible Cause Possible Solution Navigator cannot receive satellite signals or does not orient Unit may be inside a tunnel, inside a building, or tall buildings may obstruct the... Check for obstructions Mapping SD card may be removed for music or photo functions Re-install Mapping SD Card Satellite signal strength is obstructed by buildings or other external interference may cause the unit to reset the unit. Comes and goes. Rechargeable battery is weak...
... 21 If the problems still exist, please cut off and on again to reset using Reset button on rear. Troubleshooting Problem Possible Cause Possible Solution Navigator cannot receive satellite signals or does not orient Unit may be inside a tunnel, inside a building, or tall buildings may obstruct the... Check for obstructions Mapping SD card may be removed for music or photo functions Re-install Mapping SD Card Satellite signal strength is obstructed by buildings or other external interference may cause the unit to reset the unit. Comes and goes. Rechargeable battery is weak...