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:
vSelf-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.
vOptional-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 the Lenovo Limited Warranty-01 (LLW) warranty URL “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. Click Access Help. CRU URL offers three options: auto detect, “key in 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:
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