Appendix B. Customer Replaceable Units (Crus) - Lenovo ThinkPad SL410 Service And 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 CRU: 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:
v 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.
v 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, 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 Service and Troubleshooting Guide
(this guide) and Setup Instructions provide 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:
v The Customer Support Center. For the telephone number of the Support
Center for your country or region, see "Worldwide telephone list" on page
7.
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