Octoprint, the pi, and my pc no longer see my rumba board. Tried a known good usb cable, and tried reflashing the rumba on the via an arudino connected to the isp. Used the USB2Serial.Hex file, but looking for confirmation/advice that I am using the right hex file. I am flashing the 16u2 chip thats in the lower left corner near the actual usb port. Thanks in advance. Powered the printer off one day to clean out dust, powered on, and no usb connectivity. I can however control via the lcd and print from sd.