Dell XPS 730 (Late 2008) - Manual (Page 82)

80 Replacing Fans
2 Remove the processor fan shroud (see "Removing the Card Slot and
Processor Fan Shrouds" on page 77)
3 Disconnect the fan cable from the FAN_CPU_FRONT connector on the
Master Control Board (see "Master Control Board" on page 12).
4 Loosen the captive screws securing the processor fan shroud to the
chassis, then rotate the shroud back.
5 To Install the processor fan assembly, align the hinge slots on the processor
fan shroud with the hinge guides on the chassis.
6 Gently rotate the processor fan shroud towards the fan, and then tighten
the two captive screws.
7 Connect the fan cable to the rear fan connector on the LED circuit board
at the back of the chassis.
8 Replace the processor fan shroud on top o the processor fan assembly, and
then tighten the two captive screws.
9 Replace the computer cover (see "Replacing the Computer Cover" on
page 17).
10 Connect your computer and devices to electrical outlets, and turn
them on.
Replacing the Hard Drive Fan
1 Follow the procedures in "Before You Begin" on page 13.
2 Remove the computer cover (see "Replacing the Computer Cover" on
page 17).
3 Remove all installed memory modules (see "Replacing Memory
Module(s)" on page 23).
4 Disconnect the fan cable from the FAN_CPU_FRONT connector on the
Master Control Board (see "Master Control Board" on page 12).
5 Press the release latch on the hard drive fan and slide it away from the hard
drive bays and lift to remove from the computer.