Dell Precision T5400 (Late 2007) - Manual (Page 222)

222 Adding and Replacing Parts
NOTE: The screws installed in the following step must be installed in the front four
screw holes in order for the drive to be installed.
2 Install 4 screws in the front four holes on the sides of the drive, if they are
not already installed.
Otherwise, verify that the screws are installed in the front 4 holes.
3 Follow the procedures in "Before You Begin" on page 151.
4 Remove the computer cover (see "Removing the Computer Cover" on
page 153).
5 Remove the drive panel (see "Removing the Drive Panel" on page 233).
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 FlexBay is not populated and metal shields are present in your
computer (see "About the Metal Shields Present in Some Drive
Configurations" on page 207 for more information), slide the sliding-plate
lever to the right and hold it in place as you pull to remove the vented
metal insert from the FlexBay.
7 If you already have a floppy drive or Media Card Reader installed in the
FlexBay, remove it (see "Removing a Floppy Drive (Tower Computer)" on
page 240 or "Removing a Media Card Reader (Tower Computer)" on
page 254).
8 If you already have a hard drive installed in the FlexBay, remove the hard
drive (see "Removing an Optional Third Hard Drive (Tower Computer
Only)" on page 218).
9 Gently slide the drive into place in the FlexBay; the drive clicks through
two notches before it is securely installed.