User Manual

Table Of Contents

Chapter 3. Help and support

What are CRUs

Customer Replaceable Units (CRUs) are parts that can be upgraded or replaced by the customer. Your

Chromebook contains the following types of CRUs:

• Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or by

trained service technicians at an additional cost.

• Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater skill

level. Trained service technicians can also provide service to install or replace the parts under the type of

warranty designated for the customer’s machine.

If you intend on installing a 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

might 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

might be charged for the replacement CRU if Lenovo does not receive the defective CRU within thirty (30)

days of your receipt of the replacement CRU. For full details, see the Lenovo Limited Warranty

documentation at

https://www.lenovo.com/warranty/llw_02.

Refer to the following CRU list for your Chromebook.

Self-service CRUs

• ac power adapter

• Base cover assembly

• Lenovo Garaged USI Pen*

• Power cord

* for selected models

Disabling the built-in battery

Before replacing any CRU, ensure that you disable the built-in battery.

To disable the built-in battery, press

together with the power button for about five seconds, and detach

the ac power adapter from the Chromebook at the same time.

Note: Power supply from the built-in battery will resume after you reconnect the Chromebook to the ac

power adapter.

Base cover assembly

Prerequisite

Before you start, read Appendix A “Important safety information” on page 25 and print the following

instructions.

Note: Do not remove the base cover assembly when your Chromebook is connected to ac power.

Otherwise, there might be a risk of short circuits.