So this is the second pin that is acting up since I hosted a tournament last weekend. All of column two in the switch matrix is now out. I have checked for loose diodes and bad diodes in the column. All test okay and are well soldered. The connection at 2J2 is new and I am running a Rottendog board. The schematic shows column 2 connecting at pin 8 of 2j2 which is IC 17. What should IC 17 be doing when tested with a logic probe so I can rule it out?