My motors will not move despite being connected to the power board

My transmitter is connected with the receiver, I have calibrated the sensors, assigned the flight modes, and the rest of the basic setup, but I am not able to move the motors after arming the system and the motors just beep continuously . I am using the pixhawk 4 with a motor system. Any ideas as to why I cannot move the motors?

Continuous beeping means the ESCs are not getting any valid signal.
Are they connected to the Main outputs 1, 2 and so on?
Maybe a picture of the wiring.

Hello @Spinach

Double check if you did not invert the PWM signals at your outputs.

As @xfacta said, send us a picture of your wiring, probably it is related to it.