Old Fashioned Common Sense

In the past two weeks my staff has come to me with the same problem. The printer in their office was not working. Bear in mind that these people are doctors. They are smart. In each instance, they explained the issue. The computer does not send the information to the printer. They  tried rebooting it, new toners, new drum and filling it with paper. Last week I was called at home to troubleshoot the problem. When I got into my office the next day, I immediately diagnosed the problem. The cleaning people had unplugged the wire from the power source so they could vacuum. I did not need to go to techie school, nor have my PhD in computer studies. I just needed my common sense.