General Safety Guidelines; Service And Upgrades - Lenovo 6491 User Manual

In the unlikely event that you notice any of the following conditions, or if you
have any safety concerns with your product, stop using the product and unplug
it from the power source and telecommunication lines until you can speak to the
Customer Support Center for further guidance. See Chapter 8, "Getting
information, help, and service," on page 61.
v Power cords, plugs, power adapters, extension cords, surge protectors, or power
v Signs of overheating, smoke, sparks, or fire.
v Damage to a battery (such as cracks, dents, or creases), discharge from a battery,
v A cracking, hissing, or popping sound, or strong odor that comes from the
v Signs that liquid has been spilled or an object has fallen onto the computer
v The computer product, power cord, or power adapter has been exposed to
v The product has been dropped or damaged in any way.
v The product does not operate normally when you follow the operating
Note: If you notice these conditions with a product (such as an extension cord)

General safety guidelines

Always observe the following precautions to reduce the risk of injury and property
damage.

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.
Although there are no moving parts in your computer after the power cord has
been disconnected, the following warnings are required for your safety.
vi
User Guide
supplies that are cracked, broken, or damaged.
or a buildup of foreign substances on the battery.
product.
product, the power cord, or power adapter.
water.
instructions.
that is not manufactured for or by Lenovo, stop using that product until you
can contact the product manufacturer for further instructions, or until you
get a suitable replacement.
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 an ac power cord, always make sure that the power is turned
off and that the product is unplugged from any power source. For more
information on CRUs, refer to the User Guide for this product. If you have
any questions or concerns, contact the Customer Support Center.