It's weird, I've been thinking about this for a good 15 minutes and can't really come up with anything, which surprises me, because I liked video and computer games just as much as a child and can list all kinds of non-scary things that spooked the heck out of me as a child in that category.
Thinking about it some more, I do remember one thing, but it's a really weird one... when I was young I saw an episode of Wheel of Fortune where the score was tied at the end so they had to play a tiebreaker round with only the two leading contestants. I was
very young at the time, and my brain missed or mixed up pretty much all of the details. Somehow I wound up getting it in my head that one of the players was disqualified because the flipper in front of them on the wheel broke off. So for a few years it always scared me when a contestant had to pick a prize wedge up off the wheel, because I was afraid they might accidentally snap the flipper off the wheel and get disqualified.