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Removal and replacement procedures
Maintenance and Service Guide 4–13
3. Spread the retaining tabs 1 on each side of the memory module slot to release the memory module. (The edge
of the module opposite the slot rises away from the computer.)
4. Remove the memory module 2 by pulling the module away from the slot at an angle.
✎
Memory modules are designed with a notch 3 to prevent incorrect installation into the memory module slot.
Reverse this procedure to install a memory module.
WLAN module
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CAUTION: The WLAN module and the WWAN module are not interchangeable.
Before removing the WLAN 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 4-6).
Description Spare part number
Atheros AR2425 802.11 b/g WLAN module 49339-001
Atheros AR2425 802.11 b/g WLAN module 459339-002
Broadcom BCM4312 802.11 b/g WLAN module 459263-001
Broadcom BCM4312 802.11 b/g WLAN module 459263-002
Intel Wi-Fi Link 5100 802.11 a/b/g/n 480985-001
Atheros AR9280 802.11 a/b/g/n WLAN module 482260-001
Atheros AR9280 802.11 a/b/g/n WLAN module 482260-002
Intel Wi-Fi Link 5100 802.11 a/b/g 482957-001