Chapter 1. Read this first: Important safety informationThis chapter contains the safety information that you must be familiar with.General safetyFollow these rules to ensure general safety:• Keep the areas around the computer clear and clean during and after maintenance.• When lifting any heavy object:1. Ensure you can stand safely without slipping.2. Distribute the weight of the object equally across both feet.3. Lift slowly. Never move suddenly or twist when you attempt to lift.4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from themuscles in your back.Do not attempt to lift any objects that weigh more than 16 kg (35 lb) or objects that you think aretoo heavy for you.• Do not perform any action that would create a hazard for the customer, or would make the computerunsafe.• Before you start the computer, ensure that other service representatives and customer personnel are notin a position that would create a hazard for them.• Place removed covers and other parts in a safe place, away from all personnel, while you are servicing thecomputer.• Keep your tool case away from areas that people may walk through to ensure no-one trips over it.• Do not wear loose clothing that can be trapped in the moving parts of a machine. Ensure that your sleevesare fastened or rolled up above your elbows. If your hair is long, tie or fasten it back.• Insert the ends of your necktie or scarf inside clothing or fasten it with a non-conductive clip,approximately 8 centimeters (3 inches) from the end.• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.Remember: Metal objects are good electrical conductors.• Wear safety glasses when you are: hammering, drilling soldering, cutting wire, attaching springs, usingsolvents, or working in any other conditions that might be hazardous to your eyes.• After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety devicethat is worn or defective.• Reattach all covers correctly before returning the computer to the customer.Electrical safetyCAUTION:Electrical current from power, telephone, and communication cables can be hazardous. To avoidpersonal injury or equipment damage, disconnect any attached power cords, telecommunicationcables, network cables, and modem cables before you open the computer covers, unless instructedotherwise in the installation and configuration procedures.© Copyright Lenovo 2016 1