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Microprocessor
0.01 mL of
thermal grease
Note:
0.01ML
is
one
tick
mark
on
the
syringe.
If
the
grease
is
properly
applied,
approximately
half
(0.22ML)
of
the
grease
will
remain
in
the
syringe.
8.
Place
the
heat
sink
into
position
on
the
microprocessor
and
replace
the
air
baffle
over
the
heat
sink.
9.
When
tightening
the
screws
that
clamp
the
heat
sink,
do
not
overtighten.
Tighten
the
clamp
screws
evenly
by
tightening
one
side
some
and
then
the
other
until
they
are
both
snug.
v
If
you
are
replacing
only
the
microprocessor,
go
to
“Completing
the
installation”
on
page
46.
v
If
you
are
installing
a
new
system
board
assembly,
return
to
the
system
board
procedure.
Removing
and
replacing
the
battery
Your
computer
has
a
special
type
of
memory
that
maintains
the
date,
time,
and
settings
for
built-in
features,
such
as
parallel-port
assignments
(configuration).
A
battery,
sometimes
called
the
CMOS
battery,
keeps
this
information
active
when
you
turn
off
the
computer.
The
battery
normally
requires
no
charging
or
maintenance
throughout
its
life;
however,
no
battery
lasts
forever.
If
the
battery
fails,
the
date,
time,
and
configuration
information
(including
passwords)
are
lost.
An
error
message
is
displayed
when
you
turn
on
the
computer.
Refer
to
“Lithium
battery
notice”
on
page
x
for
information
about
replacing
and
disposing
of
the
battery.
Important
Before
you
install
or
remove
any
component,
read
“Important
safety
information”
on
page
v.
These
precautions
and
guidelines
will
help
you
work
safely.
To
change
the
battery:
1.
Turn
off
the
computer
and
disconnect
the
power
cord
from
the
electrical
outlet
and
from
the
computer.
2.
Open
the
cover.
See
“Opening
the
cover”
on
page
10.
3.
Refer
to
“Identifying
parts
on
the
system
board”
on
page
13
and
locate
the
battery.
Appendix
A.
Replacing
customer
replaceable
units
(CRU)
41