I replaced a keyboard connector on a1398 board and everything works except a couple keys: enter key, question mark, backslash, p, zero keys. I've zoomed in on pins and can see clearly no bridges on pins, all pins are solid to board and inside the connector the distances between the top and bottom pins are the same with door closed on the connector. Figured it must be the keyboard and tried a new keyboard and same keys are not working... could this be board trace on one of the pins?