Dell OptiPlex 755 User's Guide - Page 116

12 If you removed a sound card: a Enter system setup, select Audio Controller, and change the setting to On (see "Entering System Setup" on page 280). b Connect external audio devices to the audio connectors on the computer back panel. 13 If you removed a network adapter card: a Enter system setup, select Network Controller, and change the setting to On (see "Entering System Setup" on page 280). b Connect the network cable to the integrated network connector on the back panel of the computer. PS/2 Serial Port Adapter CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide. NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis. Installing a PS/2 Serial Port Adapter 1 Follow the procedures in "Before You Begin" on page 21. 2 Remove the computer cover (see "Removing the Computer Cover" on page 90). 3 Gently lift the release tab on the card retention latch from the inside to pivot the latch open. Pivot the latch until it snaps into the open position. 4 Remove the filler bracket (if applicable). NOTE: See the documentation that came with the adapter for information on configuring the adapter, making internal connections, or customizing it for your computer. 116 Expansion Cards