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FRU removals and replacements
This section contains information about removals and
replacements.
v Do not damage any parts. Only certified and trained
personnel should service the computer.
v 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.
v Any FRUs that must be removed before removing the
failing FRU are listed at the top of the page.
v To replace a FRU, reverse the removal procedure and
follow any notes that pertain to replacement. See
“Locations” on page 84 for internal cable connections
and arrangement information.
v When replacing a FRU, use the correct screw size, as
shown in the procedure.
Safety Notice 1
Translations in ″Safety Notices (Multi-lingual
Translations)″ section: 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 shorts.
Safety Notice 3
Translations in ″Safety Notices (Multi-lingual
Translations)″ section: 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. Use only the battery in the
appropriate parts listing when replacing the battery
pack. Use of an incorrect battery can result in
ignition or explosion of the battery.
56 ThinkPad R30/R31 HMM