Dell OptiPlex 755 User Manual page 122

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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:
Align the tabs in the side of the riser-card cage with the slots on the side of the computer, and slide
a
the riser-card cage down into place.
Ensure that the riser-card connectors are fully seated in the connectors on the system board.
b
Rotate the riser-card cage handle to the down position.
c
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Expansion Cards
riser-card cage 2 handle 3
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2
3
riser cards (2)