Answer from a novice: No. None of these screws are electrically connected to the computer. These are all mechanical fasteners. A single missing screw will, likely, only create additional flex in the typing deck. It may be annoying, but won't impact the function of the computer.
Reputation over time
It looks like this user hasn't gained any reputation yet.
Once they have, you'll be able to view a graph of their reputation gained over time.
Here's a preview of what the graph will look like:
Answer from a novice: No. None of these screws are electrically connected to the computer. These are all mechanical fasteners. A single missing screw will, likely, only create additional flex in the typing deck. It may be annoying, but won't impact the function of the computer.