I think it depends on if the person is trying to sound smart "Hey, I know what a hard drive is" or is just describing the interaction point with the computer. Those who aren't trying to sound smart say things like "My mouse is broken" (esp. on old macs that would freeze up). Rational in a way...they move and click the mouse and the pointer doesn't move. Must be a broken mouse, right? I've also heard "My monitor is broken" for a computer that wouldn't boot.
But that's all to be expected. Just smile and nod and ask the right diagnostic questions. That's your job, after all.