Lenovo ThinkPad i Series 1400 Hardware Maintenance Manual (August 1999) - Page 148

FRU Removals and Replacements, circuit it. Dispose the battery pack as required by local

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FRU Removals and Replacements This section contains information about removals and replacements. Do not damage any parts. Only certified and trained personnel should service the computer. The arrows in this section show the direction of movement 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. Any FRUs that must be removed before removing the failing FRU are listed at the top of the page. To replace a FRU, reverse the removal procedure and follow any notes that pertain to replacement. See "Locations" on page 178 for internal cable connections and arrangement information. 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 replacement, 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 listening 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 shortcircuit 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 interconnecting 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. 140 ThinkPad i Series 1400 HMM

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FRU Removals and Replacements
This section contains information about removals and
replacements.
±
Do not damage any parts. Only certified and trained
personnel should service the computer.
±
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.
±
Any FRUs that must be removed before removing the
failing FRU are listed at the top of the page.
±
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.
±
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.
140
ThinkPad i Series 1400 HMM