I have an APM 1280 board, uploaded Arduplane v2.33. Since the upload an after radio setup I cannot get the APM to recognize any TX inputs. It will only recognize inputs when connected to my computer via USB but not when in normal setup. the ppm light remains solid blue. What am i doing wrong?

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Petrus, you might have a wiring problem :-)

Switch in the correct position?

thanks gustav, I think I found the problem, my speed controller output. will let you know


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