There is not yet any consensus about what to do with repair questions and to what extent they are allowed. It is not yet addressed by the site policies as they stand. This meta post is a good place to discuss this and perhaps come up with specific rules. But until there is community consensus, please don't run off closing posts. This isn't electronics.stackexchange.com.

@Lundin If we let the repair posts accumulate, then everyone who visits our site thinks that repair posts are okay, and they will post more. We will end up with a runaway effect. So, it makes sense to nip this in the bud at an early stage.

My point here is that we discuss things as a community and come up with a consensus about what to do with these kind of questions before we run off to moderate posts. The current on-topic/off-topic list doesn't even address repair questions.

+Lundin. Just because something is not covered by site policy does not mean it is off-topic. That is something you came up with.

@Lundin I'd like to share an article with you: A Group Is Its Own Worst Enemy by Clay Shirky. I've read it many years ago, and it had shaped my perspective.