3 out of 4 Tekko32 ESC(35A) runs only

I have a Pixhawk-4 and 4 Tekko32 ESC(35A) attached through PM07 on a X-500, but only motor 1, 2 and 4 are running during the Motor Test in the Mission Planner. The Motors are configured as Servo-9 to Servo-12 and the telemetry on the ESC shows they have power. The system is new and never been able to fly it. Checked the wiring and they are solid. I updated the Firmware on PixHawk-4 as well. But, Can’t see any reason as why Motor #3 is NOT running or turning!

ny idea please let me know.

Thanks.:grinning_face: