Pixhawk Main LED not flashing

Hey guys! I got to the point where my pixhawk + raspberry pi drone was armed, but now it won’t arm when I plug it back in. Main LED on Pixhawk won’t work, GPS shows no GPS, motors will not spin. I will literally pay someone to help me solve this issue. Currently, i’m using…
-Arducopter 4.1.5
*Message received: Motors not associated

I tried reverting to 4.0.3,
*Message received: Initializing apm (continously running)

***-I/O & FMU LEDs are on, and I can’t find any solution on the internet. Yes, I looked at the other arducopter post about this same issue.

At one point, everything was working fine. I got the motors to spin briefly, the GPS to say 3D Fix, and the main LED on the Pixhawk was working fine.

Any advice is appreciated! Thank you so much.