The procedures in this section assume that you are familiar with the general terminology associated with personal
computers and with the safety practices and regulatory compliance required for using and modifying electronic equipment.
Your computer may not be equipped with all of the hardware features discussed in this section, therefore, some
instructions may not apply to your specific computer. The interior configuration may vary from the illustrations, depending on
the system purchased. To view the specific hardware configuration for your computer, see the online specifications sheet.
Before you upgrade your computer
Disconnect the computer from its power source and from telecommunications links, networks, or modems before you open
the unit or follow any of the procedures described in this section. Failure to do so may result in personal injury or equipment
Electrostatic discharge (ESD) can damage disk drives, add-on cards, and other components. Work at an ESD workstation
when following the procedures described in this section. If such a station is not available, use these precautions:
Avoid working in a carpeted area
Do not handle materials that may produce or hold static electricity, such as cellophane wrappers.
Ground yourself by maintaining continuous contact with an unpainted metal portion of the chassis while performing
When removing a slot cover, avoid rough handling that may damage components on the system board or add-on cards. You
may need to temporarily remove add-on cards that are near the slot cover you plan to remove.
Electrostatic discharge (ESD) can damage disk drives, add-on cards, and other components. Follow the
procedures described here only at an ESD workstation. If such a station is not available, do not work in a carpeted
area and do not handle materials that produce or hold static electricity (for example, cellophane wrappers). Ground
yourself by maintaining continuous contact with an unpainted metal portion of the chassis while performing the
Always turn the power off before you open the system or connect your computer to peripheral equipment. Otherwise,
damage may occur to the integrated circuits in your computer.