Place your bets on the PS/2 “planar” (motherboard) fault (Patreon)

Las Vegas time! Put in your bet! 

In Part 4 of our IBM PS/2 repair adventure, Eric changed the IO chip and finally got the “planar” to behave. But it worked only after he prodded it with his magic finger or put cold spray on the IO chip. Then it seemed to work fine for a while, but even then we got it to fail a couple more times. There were many opinions about this intermittent fault in the comments. Before we reveal the annoying fault it in the next video, I thought it would be fun to take a Patreon bet. What do you think the problem actually is? Note: you can only bet $0, but if you win, we’ll give you back 10 times your bet! 

Options below are roughly by order of comment popularity.