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Please make a few checks beforehand:
Check the power supply, Make make it 12V12 V,
Check if .Net framework is installed and up to date.
You can check to this linkhere : https://wiki.teltonika-gps.com/view/FMB640_First_Start#PC_Connection_.28Windows.29
Does the device start?
Please, try to use another power supply.
If external voltage is correct, please, check if device is visible in device manager,
May be It is possible that the firmware version is not supported by the configurator.
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