For
machine
type
2684,
2685
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.
Removing
and
replacing
a
FRU
ThinkPad
R40
111
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