The connection indicator (right top) shows the state of the serial communication. If the display is green, the communication is OK, otherwise (red) the communication does not work. Possible reasons are:
| · | the navigator box is not connected with the computer
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| · | the navigator box is connected to the wrong serial port. To solve the problem select another com port (menu options/com), change COM- Registry setting or connect the cable to another comport.
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