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Appendix B. Customer Replaceable Units (CRUs)

Customer Replaceable Units (CRUs) are computer parts that the customer

can upgrade or replace. There are two types of CRUs: self-service and

optional-service. Self-service CRUs are easy to install. They may be standalone

or latched, or require a screwdriver to remove a maximum of two screws, whereas

optional-service CRUs require some technical skill, as well as tools such as a

screwdriver. However, both self-service and optional-service CRUs are safe for

the customer to remove and replace.

Customers are responsible for replacing all self-service CRUs. Optional-service

CRUs can be removed and installed by customers or, during the warranty period,

by a Lenovo service technician.

Lenovo notebook computers contain both self-service and optional-service CRUs:

• Self-service CRUs: these CRUs can be unplugged, or are secured by no more

than two screws. Examples of this type of CRU are the AC adapter, the power

cord, the battery, and the hard drive. In some products, such components as

memory, wireless cards, notebook keyboards, and palm rests with fingerprint

reader and touchpad may also be CRUs.

• Optional-service CRUs: these CRUs are isolated parts within the computer

that are concealed by an access panel, which is typically secured by more than

two screws. Once the access panel is removed, the CRU is visible. Both types

of CRU are listed in the table on the following page.

Online Access Help and Lenovo Internet Support site,

http://www.lenovo.com/CRUs, provide instructions for replacing self-service

and optional-service CRUs.

To start the Access Help program, do as follows:

• For Windows 7: Click Start and click Help and Support. In the Windows Help

and Support, click Lenovo Access Help.

• For Windows XP: Click Start, move the pointer to All Programs; then to

ThinkVantage; then click Access Help.

Lenovo Internet Support site, http://www.lenovo.com/CRUs, offers three options

to begin your search: auto detect, "enter the machine type," and a "drop down

and select." Additionally, the Setup Instructions provides instructions for several

critical CRUs.

If you are unable to access these instructions or if you have difficulty replacing a

CRU, you can use the following additional resource:

• The Customer Support Center. For the telephone number of the Support

Center for your country or region, see "Worldwide telephone list" on page 5.