Dell Dimension 9100 Service Manual page 16

5. If your computer includes a card retention mechanism:
a. Grasp the end of the card retention mechanism and, while pressing the release tab down with your thumb, rotate the mechanism towards the
base of the computer.
b. Detach the mechanism from its retaining tabs and set it aside in a secure location.
6. If a "piano" bracket (for full-length PCI-E cards) is present on your computer, rotate it upward by pressing the tabs on the side of the bracket toward
each other.
7. If you are replacing or removing a card:
a. If necessary, disconnect any cables connected to the card.
b. Pull the securing tab (if present), grasp the card by its top corners, and ease it out of its connector.
c. If you are not replacing the card, 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. If you are installing a new card, remove the filler bracket to create a card-slot opening
9. Prepare the card for installation.
See the documentation that came with the card for information on configuring the card, making internal connections, or otherwise customizing it for your
computer.
CAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, be
sure to unplug your computer from its electrical outlet before installing any cards.
10. Position the card so that it is aligned with the slot and (if present) the securing tab is aligned with the securing slot.
NOTICE: Ensure that you release the securing tab to seat the card. If the card is not installed correctly, you may damage the system board.
11. Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot.