8If you are not replacing the RAC card, disconnect and remove the ribbon cables from the system board and insert the plastic filler plug in the system back panel.

NOTICE: When detaching the RAC cables from the system board, squeeze the metal ends of the cable connectors and gently work the connector out of the socket. Do not pull on the cable to unseat the connector. Doing so can damage the cable.

9Reinstall expansion-card riser 1. See "Replacing Expansion-Card Riser 1" on page 99.

10Reinstall all expansion cards in expansion-card riser 1. See "Installing an Expansion Card" on page 91.

11Close the system. See "Closing the System" on page 71.

Installing a RAC Card

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.

1Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.

2Open the system. See "Opening the System" on page 71.

3Remove all expansion cards from expansion-card riser 1. See "Removing an Expansion Card" on page 92.

4Remove expansion-card riser 1. See "Removing Expansion-Card Riser 1" on page 99.

5If you are installing a RAC card for the first time, remove the plastic filler plug from the system back panel. See Figure 3-20.

6Angle the RAC card so that its NIC connector inserts through the back- panel RAC card opening, and then straighten the card.

7Position the back edge of the card so that the cutout on the edge of the card inserts into the support standoff. See Figure 3-20.

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Installing System Components

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Dell R805 owner manual Installing a RAC Card