Turn off port P4 after connection power or reset

When I turn on the power for the MPCNC (with a Co2 laser) it turns on the laser, …
Where do I change the firmware that port P4 is turned off when powering it up?

I use this board: MKS Gen 1.4
See image for the port (name Servos2) if im right this are the aux ports.
(#define SERVO3_PIN 49 // AUX3-3)

But then :slight_smile: