A CRU is a service part that can be removed and replaced by the customer. The CRU ID, located in a service parts list, indicates the level of difficulty:

• CRU ID 1 identifies parts that are fairly simple to replace, requiring few or no tools.
• CRU ID 2 identifies parts that are slightly more difficult to replace.
• CRU ID N identifies parts that are not to be replaced by the customer

Some problems with your product may be resolved with a replacement part you can install yourself, called a "Customer Replaceable Unit" or " CRU". Some CRUs are designated as Self-service CRUs and others are designated as Optional-service CRUs. Installation of Self-service CRUs is your responsibility; you may request that Lenovo install an Optional-service CRU according to the warranty service for your product. Where you are installing the CRU, Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your product and are available from Lenovo at any time upon request.

You may be required to return the defective part that is replaced by the CRU. When return is required:

1. Return instructions, a prepaid shipping label, and a container will be included with the replacement CRU; and
2. You may be charged for the replacement CRU if Lenovo does not receive the defective part within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full details.

Note: If your system is covered under warranty, we recommend you contact your local technical support center for additional assistance.

View the available Customer Replaceable Unit (CRU) service parts installation and removal movies.

Note: Systems without links currently do not have any parts movies available. For specific instructions for the removal and installation of hardware, refer to the Removal and Installation Instructions content under Product & Parts Detail or view the appropriate Hardware Maintenance Manual.