Maintain and fixing stuff such as software, tech, e.t.c.
I asked a question in "Electrical engineering" about how to find a problem with a pair of speakers. But question about fixing speakers are considered to be off topic there.
Sometimes people can't find an answer for a problem with maintaining of fixing something. The fact, that many people "lurk" in StackExchange, makes the platform a great place to search or ask for an answer.
Here I'll have to ask more than one question. I think they are better asked all together.
I might be missing the section/s that are suitable for such questions. Could someone address me to them, if they exist? If there are none, can we expect any in the future? If not, why?