I connected the RX to the APM tonight, plugged in the battery and hoped to see life, but nothing.
Gear: APM 2.5, Spektrum DX8 with AR8000 receiver.
I read that the power in the AR8000 was distributed across the board so it wouldn't matter where it was plugged in. Given I didn't have any two wire cables, I just used one of the remaining AUX ports from the APM.
When connecting the battery, the ESCs sound, the APM is powered and looking like a Xmas tree... All appears to be ok - except for the RX. However, when I plug in the BIND plug, the main receiver and the satellite receiver illuminate.
I have attached some pics - would someone please be kind enough to have a look and let me know if they have any thoughts?