You cannot manipulate such a system with a screwdriver – you cannot manipulate it at all. A computer software decides whether you have won or not. Each cabinet is connected to a central server, which actually “spins” the reels. The inside of a slot cabinet looks like a computer case.
If you open a slot machine cabinet and look inside, you won’t be seeing any “cogs”. The spinning reels you are seeing are actually a piece of a computer code. Thing is, they are totally “digital” since the 90’s. Most of the players still think that they are made of cogs and wheels. (We are giving a couple examples below.) To understand why, you must learn how slot machines work. There was a time when this was possible, but not anymore. This is not a click-bait article, we are giving you the answer right away.