Client: “I’m typing on the keyboard, but it doesn’t show on the screen!”

Me: “Have you checked the cable from the keyboard to the computer?”

Client: “Yes, I’ve checked all the cables.”

Me: “Okay. Could you please give me the serial number on the computer, and I’ll be right out?”

Client: “Sure, just give me a moment to find a flashlight…”

Me: “Flashlight?”

Client: “Yeah, somebody blew a fuse and there’s no light. I can hardly see anything.”