Dell XPS 730 (Late 2008) - Manual (Page 71)

Replacing the Heat Sink Assembly 69
Replacing the Liquid Cooling Heat Sink Assembly
WARNING: The liquid cooling assembly is responsible for cooling the system
board chipset in addition to the CPU. If the liquid cooling assembly is replaced
with an assembly other than the original, a cooling solution must be installed to
avoid overheating the chipset. Failure to install a cooling solution, either third-
party or Dell provided, may result in damage to your system and render the system
inoperable.
1 Follow the procedures in "Before You Begin" on page 13.
2 Remove the computer cover (see "Replacing the Computer Cover" on
page 17).
WARNING: The processor heat sink can get very hot during normal operation. Be
sure that the heat sink has had sufficient time to cool before you touch it.
3 Observe the following cautions when working with the liquid cooling
assembly.
• The liquid cooling assembly is not user serviceable or upgradeable. All
required service should be done by qualified service personnel only.
• The liquid cooling assembly in your system contains a non-refillable
coolant. In the event of a coolant leak, shut down your system
immediately. Unplug your system from the power outlet and contact
Dell Technical Support.
• In the event of skin contact with the coolant, wash your skin with soap
and water. Seek medical attention if irritation develops.
• In the event of eye contact with the coolant, rinse your eyes
immediately with water, with your eyelids open, for 15 minutes. Seek
medical attention if irritation persists.
4 Disconnect the liquid cooling cable from the H2C connector on the
Master Control Board (see "Master Control Board" on page 12).
CAUTION: The processor heat sink is attached to the liquid cooling assembly.
When you remove the liquid cooling assembly, lay it upside down or on its side to
avoid damaging the heatsink thermal interface.
5 Loosen the screws on the liquid cooling assembly, then lift the assembly
out of the computer and set it aside.