A friend who used to do tech support told me that he learned that instead of asking "is it plugged in" it was better to ask the customer to unplug it and plug it back in. Then they might notice that it was unplugged but they don't have to admit it. I think about that a lot
@jamey There's a lot of reseating components in servers, including cables, and sometimes in trouble tickets that covers, "it got unplugged", or, "we forgot to plug it in".