Lenovo ThinkServer Manual - Página 31

Chapter 4. Customer Replaceable Units (CRUs)

Customer Replaceable Units (CRUs) are computer parts that can be upgraded

or replaced by the customer. There are two types of CRUs: Self-service and

Optional-service. Self-service CRUs are easy to install. They might be standalone,

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

Optional-service CRUs require some technical skills and in some cases might

also require simple tools, such as a screwdriver. However, both Self-service and

Optional-service CRUs are safe for the customer to remove.

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

CRUs can be removed and installed by customers or by a Lenovo service

technician during the warranty period. Lenovo desktop computers contain both

Self-service and Optional-service CRUs.

• Self-service CRUs: These CRUs unplug or are secured by no more than two

screws. Examples of these types of CRUs include the keyboard, the mouse,

any USB device, and the power cord. Other Self-service CRUs depending

on product design might include memory modules, adapter cards, hard disk

drives, and optical drives.

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

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

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

• Both types of CRUs are listed in the following table.

The User Guide for your server provides instructions for replacing Self-service and

Optional-service CRUs. The User Guide is available on both the documentation

DVD that comes with your server and the Lenovo Web site at:

http://www.lenovo.com/ThinkServerUserGuides

Note: Use only parts provided by Lenovo.