I was setup a standard quadrotors frame with pixhawk 4 FMU and abled to flight without issue . later I decided to do some changes on the frame and because of the FMU location has been changed I re-setup the flight controller unit, format the SD, update the firmware and all other parameters. Unfortunately after that I got a weird problem, despite GPS get 3D lock but I am not able to switch to Position flight mode, system reject this mode, the GPS’s led blinks blue and doesn’t turn green.
I retried and retried to re-setup FMU but every time I got the same issue. QGroundControl doesn’t show any issue, error or warning, just simple doesn’t accept position mode!
Would it be possible for one of you guys give me a hand and help me out to figure out this issue. I really frustrated after spending 10 days and couldn’t flight with my drone.