Appendix B. Customer Replaceable Units (Crus) - Lenovo ThinkPad Edge 15 Troubleshooting Manual

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.
© Copyright Lenovo 2011
17