• Way too vague of a question. There is APM1 and APM 2, and LEDS all over both boards.

    I don't think either APM has any LEDs specifc for channel inputs. The PPM encoder has a single status LED showing that it is getting at least one valid input signal but again, that's not channel 5 specific.

     APM2 has an entirely different LED logic but still no channel specific input indicator.

    You need to look at mission planner under setup to calibrate the radio inputs anyway.

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