Welcome to Chapter 2, where you'll learn about the art of debugging in a world where everything is going wrong.
Step 1: Look for the obvious things that are clearly broken.
A.K.A. The Part Where You Turn Off the Computer and Check the Plug
Turn off the computer, unplug everything, and check for loose wires.
It's like that time you spilled coffee on your shirt and had to change into a different one. It's a classic.