Lenovo B5400 Laptop User Guide

Appendix A. CRU instructions
35
Replacing memory  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
You can increase the amount of memory in your computer by installing 
double data rate three synchronous dynamic random access memory (DDR3 
SDRAM)-available as an option-in the memory slot of your computer. DDR3 
SDRAM modules are available in various capacities.
 To  install a...

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Appendix A. CRU instructions
6If two DDR3 SDRAM modules are already installed in the memory slot, 
remove one of them to make room for the new one by pressing out on the 
latches on both edges of the socket at the same time. Be sure to save the 
old DDR3 SDRAM for future use.
7Align the notch of the DDR3 SDRAM module with the protrusion of the 
socket and gently insert at a 30-45° angle.
8Push the DDR3 SDRAM module down until the latches on both sides of 
the socket lock into place.
9After aligning...

Appendix A. CRU instructions
37
To  m a k e  sure that the DDR3 SDRAM module is installed correctly, do as 
follows: 
1Turn the computer on. 
2Hold F1 during startup. The BIOS setup utility screen opens. 
The Installed memory item shows the total amount of memory installed 
in your computer. 
Note:  If only one DDR3 SDRAM module is installed in the computer you are servicing, the 
card must be installed in SLOT-0 ( : lower slot), and not in SLOT-1 ( : upper slot).
b
a 

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Appendix A. CRU instructions
Replacing the wireless LAN card - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
To  r e p l a c e  the wireless LAN card, do the following:
1Turn off the computer; then disconnect the AC power adapter and all 
cables from the computer.
2Close the computer display, and then turn the computer over.
3Remove the battery pack. For details, see “Replacing the battery pack” on 
page 28.
4Remove the screws  , and then remove the bottom...

Appendix A. CRU instructions
39
6Remove the wireless LAN card  .
7Install the new wireless LAN card.
8Reinstall and tighten the screw.
9Reconnect the two wireless LAN cables (one black, one white).
0Reinstall the bottom slot cover and tighten the screws.
AReinstall the battery pack. For details, see “Replacing the battery pack” on
page 28.
BTurn the computer over again. Reconnect the AC power adapter and the
cables to the computer.
Note:  When installing or reinstalling the wireless LAN card, make sure...

40
Appendix A. CRU instructions
Replacing the optical drive - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
To  r e p l a c e  the optical drive, do the following:
1Turn off the computer; then disconnect the AC power adapter and all 
cables from the computer.
2Close the computer display, and then turn the computer over.
3Remove the battery pack. For details, see “Replacing the battery pack” on 
page 28.
4 Remove the screws  ,...

Appendix A. CRU instructions
41
6Gently pull the optical drive out    .
7Insert a new optical drive, and then reinstall the screw to secure the drive.
8Reinstall the bottom slot cover, and then reinstall the screws to secure the 
cover.
9Reinstall the battery pack. For details, see “Replacing the battery pack” on 
page 28.
0Turn the computer over again. Reconnect the AC power adapter and the  
cables to the computer.
de
5
4
1
2 

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Appendix A. CRU instructions
The following table provides a list of CRUs for your computer, and informs 
you of where to find replacement instructions.
Self-service CRUs
Optional-service CRUs
Setup Poster User Guide
AC power adapter  ×
Power cord for AC adapter  ×
Battery pack  × ×
Backup battery  ×
Memory ×
Optical drive  ×
Setup Poster User Guide
Hard disk drive ×
Wireless LAN card  × 

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Lenovo
OneKey
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Other company, products, or service names may be trademarks or service marks 
of others. 

en-US
Rev. AA00