Test all motors: only 3 spin. In Sequence: all working

Hi all,

at a bit of a loss here… Quadcopter with Sparky 2 board. Worked with Betaflight, so I doubt it’s hardware-related.

In the Motor Test tab, I can test them all in sequence (or individually), and they all spin up fine. If I choose the “Test all motors” option, only three out of four spin up. The fourth (Motor B) doesn’t do anything.

Any ideas?


Nevermind. Rebooted the whole thing (including Mission Planner), and it’s working now. Strange.