I fixed it! 
They didn't have any more M0115 keyboards there. I figured I'd put my soldering iron to good work and I managed to fix it! I'm completely surprised. I had a 50/50 chance of guessing which ADB port was shorting, so I just desoldered one of them. Plugged the keyboard back in and it no longer automatically started. Yay! Picked the broken one. I then cannibalized one of my other keyboards for its ADB port. Soldered that one in and now it's working! Doesn't auto start.
Yaha! :lol:
They didn't have any more M0115 keyboards there. I figured I'd put my soldering iron to good work and I managed to fix it! I'm completely surprised. I had a 50/50 chance of guessing which ADB port was shorting, so I just desoldered one of them. Plugged the keyboard back in and it no longer automatically started. Yay! Picked the broken one. I then cannibalized one of my other keyboards for its ADB port. Soldered that one in and now it's working! Doesn't auto start.
Yaha! :lol: