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3. Disconnect the modem module cable (3) from the modem module.
4. Remove the modem module.
Reverse this procedure to install the modem module.
Fan/heat sink assembly
Description Spare part number
For use only on computer models equipped with a standard-voltage (35-W) processor 598789-001
For use only on computer models equipped with a low-voltage (25-W) processor 598788-001
Before removing the fan/heat sink assembly, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 44), and then remove the following components:
5. Remove the following components:
a. Memory module compartment cover (see
Expansion memory module on page 48)
b. Wireless module compartment cover (see
WLAN module on page 53)
Component replacement procedures 93