Quote Originally Posted by fluid_matrix View Post
Check out Retro Repairs on YT. He does a good job of showing step-by-step the proper way testing with a multimeter.
On the ROM, pins 11, 13, 22-38, and 42 didn't connect to anything. I can see where 11 and 13 connect, and the rest run underneath the ROM so I'm not sure where they connect to until I desolder the ROM.

Pin 11 goes to B17, Pin 13 goes to B16. Pin 1 goes to B7, Pin 21 goes to A30. Ive been trying to find a layout of this board but I cant find it.