If the solution to your computer problem is not right here on this site, when you do a search at right, you might not think to ask YouTube.
YouTube is loaded with videos on just how to fix it, whatever the problem might be.
Just formulate your question and search. That is all there is to it.
If you have misplaced your instruction manual, another thing you might do is simply to search Internet for that manual and download it. (I keep instruction manuals for everything in my Kindle document library. I often get and read the instruction manual before buying any product.}
Then, after I get something fixed, I keep my notes for future reference (and to help others) in Evernote.
If I need to contact a manufacturer, I set up an online text chat as opposed to voice communication, if that is possible.