IBM 2681 Hardware Maintenance Manual - Page 114

Important, remove, security, system, board, cannot

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Removing and replacing a FRU v System board without IBM security chip Begin by checking the FRU number of the system board, and be sure to use the correct system board FRU for the computer. For the FRU numbers, see "Parts list" on page 134. Important If the ThinkPad computer you are servicing has the security chip, mind the following: v Do not remove the security chip from the system board. If the security chip is removed by accident, reinstall it on the system board immediately. Then make sure that it is firmly fixed on the system board and does not move easily. v The security chip cannot be used with any other system board. v The system board cannot be used with other security chip. v The system board cannot be used without the security chip. v When you return the defective system board FRU, you must check whether the security chip is firmly attached to the system board. If it is not embedded, it may not be covered under warranty. 110 ThinkPad R40

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v
System
board
without
IBM
security
chip
Begin
by
checking
the
FRU
number
of
the
system
board,
and
be
sure
to
use
the
correct
system
board
FRU
for
the
computer.
For
the
FRU
numbers,
see
“
Parts
list
”
on
page
134.
Important
If
the
ThinkPad
computer
you
are
servicing
has
the
security
chip,
mind
the
following:
v
Do
not
remove
the
security
chip
from
the
system
board
.
If
the
security
chip
is
removed
by
accident,
reinstall
it
on
the
system
board
immediately.
Then
make
sure
that
it
is
firmly
fixed
on
the
system
board
and
does
not
move
easily.
v
The
security
chip
cannot
be
used
with
any
other
system
board.
v
The
system
board
cannot
be
used
with
other
security
chip.
v
The
system
board
cannot
be
used
without
the
security
chip.
v
When
you
return
the
defective
system
board
FRU,
you
must
check
whether
the
security
chip
is
firmly
attached
to
the
system
board.
If
it
is
not
embedded,
it
may
not
be
covered
under
warranty.
Removing
and
replacing
a
FRU
110
ThinkPad
R40