Can't export signal PWM

Hi everyone,
I have a PX4 and the ESC can’t receive the PWM signal from it. The led ACT of I/O session is also off. How can i fix this.


What is your software version? What steps have you done to set up the actuators?

the first, i load firmware auto from QGC.
next, i check my escs and they are ok, i wired up but the escs are not receiving signal.
Note: Since loading the firmware, the ACT light in I/O has not been on, but the previous times it was normal.

Which airframe do you chose?

Have you looked at the actuators tab and tried to configure it there?

Are you using the MAIN or IO ports?

Any screenshots from what you’re trying to do?