Replacing
the
CMOS
battery
Attention
Do
not
open
your
computer
or
attempt
any
repair
before
reading
and
understanding
the
“Important
safety
information”
in
the
ThinkCentre
Safety
and
Warranty
Guide
that
came
with
your
computer.
To
obtain
a
copy
of
the
ThinkCentre
Safety
and
Warranty
Guide
,
go
to:
http://www.lenovo.com/support
This
procedure
describes
how
to
remove
and
replace
the
CMOS
battery.
If
the
CMOS
battery
fails,
the
date,
time,
and
configuration
information
(including
passwords)
are
lost.
An
error
message
is
displayed
when
you
turn
on
the
computer.
1.
Turn
off
the
computer
and
all
attached
devices.
2.
Unplug
the
power
cord
and
remove
the
cover.
See
“Removing
the
computer
cover”
on
page
86.
3.
Locate
the
battery.
See
“Identifying
parts
on
the
system
board”
on
page
85.
4.
If
necessary,
remove
any
adapters
that
impede
access
to
the
battery.
See
“Replacing
a
PCI
adapter
card”
on
page
92
for
more
information.
5.
Remove
the
old
battery.
6.
Install
the
new
battery.
7.
Replace
any
adapters
that
were
removed
to
gain
access
to
the
battery.
See
“Replacing
a
PCI
adapter
card”
on
page
92
for
instructions
for
replacing
adapters.
8.
Replace
the
cover,
and
plug
in
the
power
cord.
See
“Completing
the
FRU
replacement”
on
page
107.
Note:
When
the
computer
is
turned
on
for
the
first
time
after
battery
replacement,
an
error
message
might
be
displayed.
This
is
normal
after
replacing
the
battery.
94
Lenovo
E200
Hardware
Maintenance
Manual
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