Joystick on stick not working properly. Need help

It just happened now. I can’t hold downback/down on the joystick. When I hold downback - it moves back and when I hold down - it doesn’t do anything. Now if I just move the joystick slightly in the direction, it does the movement.

I’ve opened up my stick and it seems like all the wires look fine so I don’t know whats wrong with the joystick. Could anybody help? Thanks.

EDIT: It’s a HRAP EX for the 360.