Motors does not turn on - Pixhawk 4 & PM07


I’m using Pixhawk 4 with PM07, and FS-iA10B receiver
When I connect ESCs with receiver using PWM protocol the motors turn on using the transmitter.
When I try to test the motors using QGC or using telemetry or the transmitter using PPM or i\s bus the motors don’t turn on!

Here is a video on Youtube for my setup and the testing, hope anyone can help

Overview on Pixhawk 4 & PM07 connection and testing

I changed the ESC’s signal connections from FMU PWM OUT/IN to I/O PWM OUT/IN and the problem solved