In summary, basically it was a mid-twenties guy who was just fumbling about in the backbox with absolutely no pin repair experience. He's one of those young guys from my generation with the N64 logo for his YouTube avatar. He basically explained he has had the game for a few months and it has never worked 100%. He bought the board blind and started yanking out connectors (sometimes by the wire) from the original power supply making comments like "I have no clue what I'm doing" and "I have no clue where this stuff is supposed to go, I hope it's all in the same place on the new board."
He then proceeds to remove the old board, open the new one without even glancing once at any of the install instructions or disclaimers, and starts yanking on the GI header for some reason. Guess he thought there was a plug inserted there? He was doing it with some force, what would happen if he damaged something I wonder? Then he makes a comment about the heatsink on the old power supply: "Gee I wonder what that's for? Oh, looks like this one does't have one." So basically he didn't even look at the pictures of the board before dropping $130. He then removes like 5 zip ties so the GI connection can reach the header on the new board. He plugs it in with stress clearly on the header, and wiggles the header afterwards. That's a 4 pin connector with 15 amps of current running through it.
Here's where it gets good. He installs the power supply and turns on the game. You hear a pop and loud buzzing sound, but he keeps it on. Game doesn't boot. He should've immediately turned it off. He leaves the freaking thing turned on for about 30 seconds, mumbling about "Huh, hasn't done that before. I don't see anything weird going on. Oh crap, something's cooking. I'd better turn it off." Smoke billows out from the shooter lane. He lifts the playfield. "Wow that's really hot guys. Is it burned? If there's something else I should be checking please let me know in the comments. I have no idea how this is supposed to go." He then comments on the game not starting. "Oops, I think I left a plug or two loose."
Then he makes another video putting the game up for sale a little later and get this, he actually gets an offer in the comments. He turns the game on, you hear the same buzzing sound, and he actually plays the thing for a good minute or two. Has to roll the ball into play because the shooter coil is fried. Magically booted in this video, maybe because he "had some connectors loose." balboarules and I leave a couple of stern comments, and he takes his ball and goes home by deleting both videos.
Holy friggin' crap. WOW.