I am testing my board and everytime I try to plug in an endstop all of the LEDs (1-4) turn off and I get disconnected from the computer. I'm not understanding what's happening. Any help would be great.
Default endstop reprap wiring is usually incorrect for these boards. Check the wiring (red = positive 5v, green = signal, black = ground) and rearrange these wires as necessary to match the markings on the azteeg board. Off the top of my head, I believe you have to switch the signal and ground wires. You can just use a pin to pry up the plastic retainer and pull the contacts out of the black plastic housing to re-arrange them.