Appendix. CRU instructions
Replacing the wireless LAN card ---------------------------------------
To replace the wireless LAN card, do the following:
1Turn off the computer. Disconnect the AC power adapter and all cables from the computer.
2Close the computer display and turn the computer over.
3Remove the battery pack.
4Remove the Hard disk drive/Memory/Central processing unit/wireless LAN card slot compartment cover.
5Disconnect the two wireless LAN cables (one black, one white) a.
1 
Note: The wireless LAN card in select models may have only one cable (black).
6Remove the screw that secures the wireless LAN card b.
2
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