Also, new stuff just isn't designed to be opened up.

I took an old monitor that started failing to a local makerspace (which has a very popular monthly repair cafe), and it took some physical force to crack the case open. Once inside it was relatively easy to get the board out and find the leaking capacitors. Not exactly high-tech parts.

It was fun for me and for the volunteer, but I can't imagine anyone trying to do this for a living -- it would take a lot of time, and charging people for what the labor's worth would probably come close to the price of a new monitor.