Okay so I connected a wire from pin 9 to the resistor in the corner and another wire from pin 9 to pin 10 of that IC in the corner. Then, I also connected a wire from pin 12 to the switch and another wire from pine 12 to that resistor network above …
Okay, thank you.
It seems that it is the pads where pin 9 and 12 of the IC labelled U12 that have been removed. I’m not completely sure how to read the schematic but it seems that pin 9 connects to a node that splits with one direction going to pin…