Hello, this is my first ever Apple 1 replica build! The video in this post is showing the main issue I've run into after having an opportunity to replace the damaged +5v regulator and the +12v regulator! My initial thought was a bad crystal but after replacing it with a new one the problem persisted. I started looking through the forums here for an answer and couldn't find one. A recent post made me start pulling chips one by one to see what was wrong. The included picture is of the running board with no 74166N chip installed at D-1. Am I on the right track?