Lenovo ThinkCentre M55 (English) User guide - Page 31

- Peripheral component interconnect (PCI) adapters - Optical drives, such as CD drives and DVD drives (some models) For the latest information about available options, see the Lenovo Web site at http://www.lenovo.com/ or contact your reseller or marketing representative. Supported operating positions You can position your computer in one of the positions shown in the following illustration. Handling static-sensitive devices Static electricity, although harmless to you, can seriously damage computer components and options. When you add an option, do not open the static-protective package containing the option until you are instructed to do so. When you handle options and other computer components, take these precautions to avoid static electricity damage: v Limit your movement. Movement can cause static electricity to build up around you. v Always handle components carefully. Handle adapters and memory modules by the edges. Never touch any exposed circuitry. v Prevent others from touching components. v When you install a new option, touch the static-protective package containing the option to a metal expansion-slot cover or other unpainted metal surface on the computer for at least two seconds. This reduces static electricity in the package and your body. v When possible, remove the option and install it directly in the computer without setting the option down. When this is not possible, place the static-protective package that the option came in on a smooth, level surface and place the option on it. Chapter 3. Installing options 15