Lenovo B4400 Laptop User Guide

Appendix. CRU (Customer Replaceable Units) instructions
37
Replacing memory - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
You can increase the amount of memory in your computer by installing a 
double-data-rate three low voltage synchronous dynamic random access 
memory (DDR3L SDRAM)-available as an option-in the memory slot of your 
computer. DDR3L SDRAMs are available in various capacities....

38
Appendix. CRU (Customer Replaceable Units) instructions
6If two DDR3L SDRAMs 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 
DDR3L SDRAM for future use.
7Align the notch of the DDR3L SDRAM with the protrusion of the socket 
and gently insert the DDR3L SDRAM into the socket at a 30-45° angle.
8Push the DDR3L SDRAM inward toward the socket until the latches on...

Appendix. CRU (Customer Replaceable Units) instructions
39
To make sure that the DDR3L SDRAM 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 DDR3L SDRAM is used on the computer you are servicing, the card must be 
installed in SLOT-0 ( : lower slot), but not in SLOT-1 ( : upper slot).
b
a 

40
Appendix. CRU (Customer Replaceable Units) instructions
Replacing the Mini PCI Express Card - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
To replace the Mini PCI Express 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/Mini PCI Express Card slot 
compartment cover.
5Disconnect the two...

Appendix. CRU (Customer Replaceable Units) instructions
41
7Take out the Mini PCI Express Card  .
8Install the new Mini PCI Express Card.
9Reinstall and tighten the screw.
0Reconnect the two cables (one black, one white).
AReinstall the compartment cover and tighten the screws.
BReinstall the battery pack.
CTurn the computer over again. 
DConnect the AC power adapter and the cables to the computer again.
Note:When installing or reinstalling the Mini PCI Express Card:
In models with a Mini PCI Express...

42
Appendix. CRU (Customer Replaceable Units) instructions
Removing the optical drive  - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
To remove 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.
4Remove the Hard disk drive/Memory/Mini PCI Express Card slot...

Appendix. CRU (Customer Replaceable Units) instructions
43
The following table provides a list of CRUs (Customer Replaceable Units) for 
your computer, and informs you of where to find replacement instructions.
Setup Poster User Guide
AC power adapter O
Power cord for AC power adapter O
Battery pack O O
Hard disk drive O
Memory O
Optical drive O
Backup battery O
Mini PCI Express Card O 

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Trademarks
The following terms are trademarks or registered trademarks of Lenovo in 
the United States, other countries, or both.
Lenovo
OneKey
Microsoft and Windows are trademarks of Microsoft Corporation in the 
United States, other countries, or both.
Other company, products, or service names may be trademarks or service 
marks of others. 

The illustrations in this manual may differ from the actual product. 
Please refer to the actual product.
•
First Edition (March 2011)
To refer to it, go to http://consumersupport.lenovo.com/ and click 
User guides and manuals. 
Regulatory Notice
•
© Copyright Lenovo 2011. 
Before using the product, be sure to read Lenovo Safety and General 
Information Guide first.
The features described in this guide are common to most models. 
Some features may not be available on your computer and/or your 
computer...

Lenovo B4400
Read the safety notices and important tips in the included manuals before using your computer.en-USRev. CT01
User Guide