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Chapter 9. Removing or replacing a FRU
This chapter provides instructions on how to remove or replace a FRU.
CRU statement for customers:
You can resolve some problems with your product 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. For optional-service CRUs, you can
either install the CRU yourself or you can request that a Service Provider install the CRU according to the warranty
service for your product. If you intend on 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 can nd a list of CRUs for your product in this Hardware Maintenance Manual. An electronic version of this
manual can be found at http://www.lenovo.com/support. Click User Guides & Manuals and then follow the
on-screen instructions to nd the manual for your product. 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. See your Lenovo
Limited Warranty documentation for full details.
General guidelines:
When removing or replacing a FRU, be sure to observe the following general guidelines:
1. Do not try to service any computer unless you have been trained and certied. An untrained person runs
the risk of damaging parts.
2. Before replacing any FRU, review Chapter 8 “FRU replacement notices” on page 53.
3. Begin by removing any FRUs that have to be removed before replacing the failing FRU. Such FRUs are
listed at the beginning of each FRU replacement procedure. Remove them in the order in which they
are listed.
4. Follow the correct sequence in the steps for removing a FRU, as given in the drawings by the numbers
in square callouts.
5. When turning a screw, turn it in the direction as given by the arrow in the drawing.
6. When removing a FRU, move it in the direction as given by the arrow in the drawing.
7. To put the new FRU in place, reverse the removal procedure and follow any notes that pertain to
replacement.
8. When replacing a FRU, use the correct screws as shown in the replacement procedure.
DANGER
Before removing any FRU, disable the built-in battery. See “Disabling the built-in battery” on page
58
.
Attention: After replacing a FRU, do not turn on the computer until you have ensured that all screws, springs,
and other small parts are in place and none are loose inside the computer. Verify this by shaking the computer
gently and listening for rattling sounds. Metallic parts or metal akes can cause electrical short circuits.
Attention: The system board is sensitive to, and can be damaged by, electrostatic discharge. Before
touching it, establish personal grounding by touching a ground point with one hand or by using an
electrostatic discharge (ESD) strap.
© Copyright Lenovo 2012
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