Static electricity preventionStatic electricity, although harmless to you, can seriously damage computer components and options.Improper handling of static-sensitive parts can damage the part. When you unpack an option or CRU, do notopen the static-protective package containing the part until the instructions direct you to install it.When you handle options or CRUs, or perform any work inside the computer, take the following precautionsto avoid static-electricity damage:• Limit your movement. Movement can cause static electricity to build up around you.• Always handle components carefully. Handle adapters, memory modules, and other circuit boards by theedges. Never touch exposed circuitry.• Prevent others from touching components.• When you install a static-sensitive option or CRU, touch the static-protective package containing the partto a metal expansion-slot cover or other unpainted metal surface on the computer for at least twoseconds. This reduces static electricity in the package and your body.• When possible, remove the static-sensitive part from the static-protective packaging and install the partwithout setting it down. When this is not possible, place the static-protective packaging on a smooth, levelsurface and place the part on it.• Do not place the part on the computer cover or other metal surface.Operating environmentTemperature• Operating: From 10°C (50°F) to 35°C (95°F)• Storage or transportation:– For common desktop computers: From -40°C (-40°F) to 55°C (131°F)– For all-in-one desktop computers: From -20°C (-4°F) to 55°C (131°F)Note: If your computer is stored or transported in temperatures less than 10°C (50°F), allow the computer torise slowly to an optimal operating temperature before use. This process might take up to two hours. Usingthe computer in a lower operating temperature might result in irreparable damage to your computer.Relative humidity• Operating: 35%-80% (non-condensing)• Storage: 20%–93% (non-condensing)Atmospheric pressure86 kPa to 106 kPaCleaning and maintenanceWith appropriate care and maintenance, your computer will serve you reliably. The following topics offerinformation to help you keep your computer working with best performance.Basic maintenance tipsHere are some basic points about keeping your computer functioning properly:• Keep the computer in a clean, dry environment. Ensure that the computer rests on a flat, steady surface.62 User Guide