IBM 2611-40A, Hardware Maintenance Manual

Page: 148 / 204

FRU Removals and Replacements
This section contains information about removals and
replacements.
Ÿ
Do not damage any parts. Only certified and trained
personnel should service the computer.
Ÿ
The arrows in this section show the direction of move-
ment to remove a FRU, or to turn a screw to release
the FRU. The arrows are marked in numeric order, in
square callout, to show the correct sequence of
removal.
Ÿ
Any FRUs that must be removed before removing the
failing FRU are listed at the top of the page.
Ÿ
To replace a FRU, reverse the removal procedure
and follow any notes that pertain to replacement. See
“Locations” on page 178 for internal cable con-
nections and arrangement information.
Ÿ
When replacing a FRU, use the correct screw size, as
shown in the procedure.
Safety Notice 1
Before the computer is powered on after FRU replace-
ment, make sure all screws, springs, or other small
parts, are in place and are not left loose inside the
computer. Verify this by shaking the computer and lis-
tening for rattling sounds. Metallic parts or metal flakes
can cause electrical short-circuits.
Safety Notice 3
The battery pack contains small amounts nickel. Do
not disassemble it, throw it into fire or water, or short-
circuit it. Dispose the battery pack as required by local
ordinances or regulations.
Safety Notice 8
Before removing any FRU, power-off the computer,
unplug all power cords from electrical outlets, remove
the battery pack, and then disconnect any intercon-
necting cables.
Attention: The system board is sensitive and can be
damaged by electronic discharge. Establish personal
grounding by touching a ground point with one hand
before touching these units. An electrostatic discharge
(ESD) strap must be used to establish personal
grounding.
An electrostatic discharge (ESD) strap (P/N: 6405959)
must be used to establish personal grounding.
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ThinkPad i Series 1400 HMM