Dell OptiPlex 755 User's Guide - Page 122
The notch in the top of the card or filler bracket fits around the alignment guide.
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1 2 3 1 riser-card cage 2 handle 3 riser cards (2) 4 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. 5 Disconnect the PS/2 serial-port cable from the system board (see "System Board Components" on page 95). 6 Grasp the PS/2 serial-port adapter bracket by its top corners, and ease it out of its connector. 7 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 also keep dust and dirt out of your computer. 8 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. 9 Secure the card(s) by closing the card retention latch and snapping it into place. 10 Replace the riser-card cage: a Align the tabs in the side of the riser-card cage with the slots on the side of the computer, and slide the riser-card cage down into place. b Ensure that the riser-card connectors are fully seated in the connectors on the system board. c Rotate the riser-card cage handle to the down position. 122 Expansion Cards