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Errata: Known Issues with the Board or Firmware
- Errata 1---MIDI IN Port Pin Inversion (25/03/2020)
- Pins 6 and 7 on the MIDI IN port of the RevC4A and RevC4B are reversed. Plugging a device into the MIDI IN port will result in a short from +5V to ground. The board can be fixed by cutting three traces (marked in blue in the diagram below), and then soldering two jumper wires (shown in orange). As an alternative if there is no desire to use MIDI IN, the pin connected to pad 7 in the diagram below could be lifted from the pad to prevent a short.