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FRU Removals and Replacements
This section contains information about removals and
replacements.
An electrostatic discharge (ESD) strap must be used
to establish personal grounding.
The system board is sensitive to, and can be
damaged by, electrostatic discharge. Establish
personal grounding by touching a ground point with
one hand before touching these units.
The arrows in the “Removals and Replacements”
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
callouts, to show the correct sequence of removal.
When other FRUs must be removed before removing
the failing FRU, they 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” for internal cable connections and
arrangement information.
When replacing a FRU, use the correct screw size as
shown in the procedures.
Safety Notice 8: Translation on page 13
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.
Safety Notice 3: Translation on page 9
The battery pack contains small amounts of nickel.
Do not disassemble it, throw it into fire or water, or
short-circuit it. Dispose of the battery pack as
required by local ordinances or regulations.
Safety Notice 1: Translation on page 7
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.
426 IBM Mobile Systems HMM