Use a non-conductive, flat-bladed tool to pry the RTC battery out of the slot.
Reverse this procedure to install the RTC battery. Be sure the RTC battery is installed with the “+” sign
facing up.
WWAN module
CAUTION: The WWAN module and WLAN module are not interchangeable.
Description Spare part number
EVDO WWAN module 399440-001
Vodafone HSPDA WWAN module 448672-002
Cingular HSPDA WWAN module 448673-002
Before removing the WWAN module, 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 48).
5. Remove the memory/WLAN module compartment cover (see
Expansion memory module
on page 56).
6. Release the keyboard (see
Keyboard on page 64).
68 Chapter 4 Removal and replacement procedures
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