Issues will always arise but when they do you need to actually properly diagnose and fix the problem and not just "jiggle" the wire. Any new game is usually going to have kinks but if you fix them properly the game will become more reliable and hopefully these surprises will become rare. It's frustrating at first but eventually becomes standard procedure anytime you buy a used pin. I usually tear a new game down and do a full shop job to make sure I catch anything before I start playing it heavily.