2. Release the WWAN cable and WLAN cable (3) from the routing around the fan, and then remove the fan
(4) from the computer.
Reverse this procedure to install the CPU (right) and GPU (left) fans.
Heat sink
Description Spare part number
Heat sink for use only with models with NVIDIA N17EQ1 discrete graphics memory 922842-001
Heat sink for use only with models with NVIDIA N17PQ1 discrete graphics memory 922843-001
Heat sink for use only with models with NVIDIA N17PQ3 discrete graphics memory 922844-001
Heat sink for use only with models with AMD UMA graphics memory 922845-001
Heat sink for use only with models with UMA graphics memory 922846-001
Before removing the heat sink, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the following components:
a. Service door (see Service door on page 30).
b. Battery (see Battery on page 31).
c. Base enclosure (see Base enclosure on page 33).
56 Chapter 6 Removal and replacement procedures for authorized service provider parts
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