Dell OptiPlex 755 User's Guide - Page 119
Installing a PS/2 Serial Port Adapter in the Riser-Card Cage
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4 Disconnect the PS/2 serial-port cable from the system board (see "System Board Components" on page 95). 5 Ease the PS/2 serial-port adapter bracket out of its retention slot. 6 If you are removing the adapter permanently, install a filler bracket in the empty card-slot opening. NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets keep dust and dirt out of your computer and maintain the airflow that cools your computer. 7 Before you close the card retention mechanism, ensure that: • The tops of all cards and filler brackets are flush with the alignment bar. • The notch in the top of the card or filler bracket fits around the alignment guide. 8 Secure any remaining card(s) by closing the card retention latch and snapping it into place. 9 Replace the computer cover (see "Replacing the Computer Cover" on page 317). Installing a PS/2 Serial Port Adapter in the Riser-Card Cage 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 Remove the riser-card cage: a Check any cables connected to cards through the back panel openings. Disconnect any cables that will not reach the riser-card cage once they are removed from the computer. Expansion Cards 119