Repairing a 45 year old handheld Mattel "video game"

Shayde writes: I went to do a quick youtube short on playing the 1976 Mattel handheld game "Auto Race" but figured out pretty quickly that the game wasn't working. So I dove into disassembling the unit and figuring out the problem. Taking it apart and debugging it was fun. (Slight spoiler: I figured out what was wrong, was an easy fix), and the game plays great now!