What safety precautions should I follow when using the HP OfficeJet 4650?

Always unplug the printer from wall outlets before cleaning, and never install or use the printer near water or when you are wet. Install the printer on a stable surface in a protected location where no one can trip over the power cord. There are no user-serviceable parts inside the printer — refer all servicing to qualified service personnel, and use only the power cord and power adapter supplied by HP. (Page 2)