Lenovo B4400 Notebook - Manual (Page 38)

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Appendix. CRU (Customer Replaceable Units) instructions
To replace the hard disk drive, 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.
4 Remove the Hard disk drive/Memory/Mini PCI Express Card slot
compartment cover.
a.Loosen the screws that secure the compartment cover .
b.Remove the compartment cover .
a
b
b
a