Dell Precision T7400 (Late 2007) - Manual (Page 159)

Adding and Replacing Parts 159
NOTICE: The memory shroud holds the (optional) memory risers in place; its
thumbscrews must be sufficiently tight in order to secure the risers and to avoid
damage.
15 Replace the memory shroud and memory fan. Tighten the thumbscrews
until the memory shroud is well secured and will not shift when the
computer is moved.
16 Ensure that all connectors are properly cabled and firmly seated.
17 Replace the computer cover (see "Replacing the Computer Cover" on
page 145).
NOTICE: To connect a network cable, first plug the cable into the network port or
device and then plug it into the computer.
18 Connect the computer and devices to electrical outlets, and turn them on.
1 heat-sink assembly 2 captive screw housing (4)
1
2