That video showed the (planned) replacement of the PCB edge connector on my Missile Command.
The machine is running now and there are two things I noticed after replacing it:
1) The colors on the screen are MUCH brighter ! Really, this was a difference between needing a less dark plexi or not ! I am absolutely amazed by it myself. I kinda noticed it right away but thought I was kidding myself, but even my wife said it improved a lot.
2) The power supply was humming really loudly before. That hum has gone away by about 75% now. Maybe I'm just imagining this one. It could also be just that the cab moved a bit or something like that.
Anyway, it shows that bad contacts create "resistors", hurting the signals.
I gotta get out my DVM to check if the 5V is not too high now because of the lower resistance in the power lines.......
Anyway, this is the first time I replaced a PCB edge connector, but it was definitely worth it. If your connector pops off as easily as this one, I strongly suggest replacing it. It's a tedious job, but definitely worth it.