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6.
Remove the WLAN module by pulling the module away from the slot at an angle.
NOTE: If the WLAN antennas are not connected to the terminals on the WLAN module, the protective
sleeves must be installed on the antenna connectors, as shown in the following illustration.
Reverse this procedure to install the WLAN module.
RTC battery
Description Spare part number
RTC battery 581926-001
Before removing the RTC battery, 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.
44 Chapter 4 Removal and replacement procedures