Lenovo B5400 Notebook - Manual (Page 44)

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Appendix A. CRU instructions
Replacing the wireless LAN card - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
To replace the wireless LAN card, do the following:
1 Turn off the computer; then disconnect the AC power adapter and all
cables from the computer.
2 Close the computer display, and then turn the computer over.
3 Remove the battery pack. For details, see “Replacing the battery pack” on
page 28.
4 Remove the screws , and then remove the bottom slot cover .
5 Disconnect the two wireless LAN cables (one black, one white) .
Remove the screw that secures the wireless LAN card .
a b
1
1
2
1
2
c
d
3 4