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Appendix D. Customer replaceable units (CRUs)
Customer Replaceable Units (CRUs) are computer parts that can be
upgraded or replaced by the customer. There are two types of CRUs:
internal
and
external
. External CRUs are easy to install, whereas internal CRUs
require some technical skills and in some cases might require tools such as a
screwdriver. However, both internal and external CRUs are safe for removal
by the customer.
Customers are responsible for replacing all external CRUs. Internal CRUs
can be removed and installed by customers or by a Lenovo service technician
during the warranty period.
Your computer contains the following types of external CRUs:
•
External CRUs (pluggable):
These CRUs unplug from the computer.
Examples of these types of CRUs include the AC adapter and power cord.
•
External CRUs with latches:
These CRUs include a latch to help you
remove and replace the part. Examples of these types of CRUs include the
notebook main battery, an optical drive, a hard-disk drive, and an
extended battery.
Your computer contains the following types of internal CRUs:
•
Internal CRUs (located behind an access panel):
These CRUs are isolated
parts within the computer that are concealed by an access panel that is
typically secured by either one or two screws. Once the access panel is
removed, only the specific CRU is visible. Examples of these types of CRUs
include memory modules and hard disk drives.
•
Internal CRUs (located within the product):
These CRUs are accessible
only by opening the computer’s outer case. Examples of these CRUs
include PCI Express Mini Cards and the integrated keyboard.
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