"I am late to the party but I am also having the same issue.Everything was working fine until my old osd stopped working and I replaced it with a micro minimosd.I have tried switching the Tx and Rx wires since that seems to always cause me problems…"

"I have been looking around for an answer and have tried a few things I found online with no luck.I am using a Frsky XSR in cppm mode with the Apm Pro and I can only get the first four channels working in the radio calibration.None of the switches…"