Dell Precision T5400 (Late 2007) - Manual (Page 271)

Adding and Replacing Parts 271
10 Ensure that all connectors are properly cabled and firmly seated.
11 Replace the computer cover (see "Replacing the Computer Cover" on
page 161).
NOTICE: To connect a network cable, first plug the cable into the network port or
device and then plug it into the computer.
12 Connect the computer and devices to electrical outlets, and turn them on.
Installing an Optical Drive (Tower Computer)
1 Follow the procedures in "Before You Begin" on page 151.
2 If you are installing a new drive, unpack the drive and prepare it for
installation.
Check the documentation that accompanied the drive to verify that the
drive is configured for your computer.
3 Remove the computer cover (see "Removing the Computer Cover" on
page 153).
4 Remove the drive panel (see "Removing the Drive Panel" on page 233).
5 If another device is installed in the optical drive bay, remove that device
(see "Removing an Optical Drive (Tower Computer)" on page 268).
NOTICE: If metal shields are present in your computer configuration, they must be
installed at all times while your computer is in use or your computer may not
function properly.
6 If the optical drive bay is unpopulated and metal shields are present in
your computer (see "About the Metal Shields Present in Some Drive
Configurations" on page 207), slide the sliding plate lever to the right and
hold it in place as you pull to remove the 5.25-inch metal shield.
7 Remove the drive-panel insert (see "Removing a Drive-Panel Insert" on
page 235).
8 If no screws are attached to the drive, check the inside of the drive panel
for shoulder screws and attach them to the new drive.