Read this first: important safety information, Before using this manual, Service and upgrades – Lenovo ThinkStation P920 Tower Workstation User Manual
Page 5
Read this first: Important safety information
This chapter contains the safety information that you must be familiar with.
Before using this manual
CAUTION:
Before using this manual, be sure to read and understand all the related safety information for this
product. Refer to the information in this section and the safety information in the
Safety, Warranty, and
Setup Guide
that you received with this product. Reading and understanding this safety information
reduces the risk of personal injury and damage to your product.
If you no longer have a copy of the
Safety, Warranty, and Setup Guide
, you can obtain a Portable Document
Format (PDF) version from the Lenovo Support Web site
The Lenovo Support
Web site also provides the
Safety, Warranty, and Setup Guide
and this
User Guide
in additional languages.
Service and upgrades
Do not attempt to service a product yourself unless instructed to do so by the Customer Support Center or
your documentation. Only use a Service Provider who is approved to repair your particular product.
Note:
Some computer parts can be upgraded or replaced by the customer. Upgrades typically are referred
to as options. Replacement parts approved for customer installation are referred to as Customer
Replaceable Units, or CRUs. Lenovo provides documentation with instructions when it is appropriate for
customers to install options or replace CRUs. You must closely follow all instructions when installing or
replacing parts. The Off state of a power indicator does not necessarily mean that voltage levels inside a
product are zero. Before you remove the covers from a product equipped with a power cord, always ensure
that the power is turned off and that the product is unplugged from any power source. For more information
about CRUs, refer to Chapter 7 “Hardware removal and installation” on page 59. If you have any questions or
concerns, contact the Customer Support Center.
Although there are no moving parts in your computer after the power cord has been disconnected, the
following warnings are required for your safety.
CAUTION:
Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury,
seek medical care immediately.
CAUTION:
Avoid contact with hot components inside the computer. During operation, some components
become hot enough to burn the skin. Before you open the computer cover, turn off the computer,
disconnect power, and wait approximately 10 minutes for the components to cool.
CAUTION:
After replacing a CRU, reinstall all protective covers, including the computer cover, before connecting
power and operating the computer. This action is important to help prevent unexpected electrical
shock and help ensure the containment of an unexpected fire that could happen under extremely rare
conditions.
CAUTION:
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