Re-building after a crash, I realized my 3dR GPS LEA6 V1.1 is
short-cutting power on my APM 2.0 board.
I am no electronics wiz, but
when GPS is disconnected - APM powers up OK
when GPS is connected - APM is "dead"
so I can assume GPS is the reason.
Same story when powering from USB or the LiPo.
This is the heart of my Octo - What do I do now?
Do 3DR still stock carry this GPS model? - I couldn't find it