![]() Set the power jumper in "USB powered" position. Then, you should flash the firmware following these steps: The problem could be caused by the USB2Serial firmware. If the board is provided with a SD card reader, printing with a SD card is still possible.įirst, be sure that the problem is not due to a bad position of the power jumper. When connecting the USB cable to the computer, the operating system does not see any device. Without any reason, the USB connection to the RUMBA is not possible. To keep my issue in place, i tried the following: ![]()
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