Lenovo ThinkCentre M55e User Manual - Page 58

Erasing, forgotten, password, clearing

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To change the battery: 1. Turn off the computer and disconnect the power cord from the electrical outlet and from the computer. 2. Remove the computer cover. See "Removing the cover" on page 22. 3. You might have to access the system board components. See "Accessing system board components" on page 24. 4. Locate the battery. See "Identifying parts on the system board" on page 25. 5. Remove the old battery. 6. Install the new battery. 7. Replace the computer cover, and connect the cables. See "Replacing the cover and connecting the cables" on page 39. 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. 8. Turn on the computer and all attached devices. 9. Use the Setup Utility program to set the date and time and any passwords. See Chapter 5, "Using the Setup Utility," on page 49. Erasing a lost or forgotten password (clearing CMOS) This section applies to lost or forgotten passwords. For more information about lost or forgotten passwords, go to the ThinkVantage Productivity Center program. To erase a forgotten password: 1. Remove the computer cover. See"Removing the cover" on page 22. 2. You might have to access the system board components. See "Accessing system board components" on page 24. 3. Locate the Clear CMOS/Recovery jumper on the system board. See "Identifying parts on the system board" on page 25. 4. Move the jumper from the standard position (pins 1 and 2) to the maintenance or configure position (pins 2 and 3). 5. Replace the computer cover and connect the power cord. See "Replacing the cover and connecting the cables" on page 39. 38 User Guide

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To
change
the
battery:
1.
Turn
off
the
computer
and
disconnect
the
power
cord
from
the
electrical
outlet
and
from
the
computer.
2.
Remove
the
computer
cover.
See
“Removing
the
cover”
on
page
22.
3.
You
might
have
to
access
the
system
board
components.
See
“Accessing
system
board
components”
on
page
24.
4.
Locate
the
battery.
See
“Identifying
parts
on
the
system
board”
on
page
25.
5.
Remove
the
old
battery.
6.
Install
the
new
battery.
7.
Replace
the
computer
cover,
and
connect
the
cables.
See
“Replacing
the
cover
and
connecting
the
cables”
on
page
39.
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.
8.
Turn
on
the
computer
and
all
attached
devices.
9.
Use
the
Setup
Utility
program
to
set
the
date
and
time
and
any
passwords.
See
Chapter
5,
“Using
the
Setup
Utility,”
on
page
49.
Erasing
a
lost
or
forgotten
password
(clearing
CMOS)
This
section
applies
to
lost
or
forgotten
passwords.
For
more
information
about
lost
or
forgotten
passwords,
go
to
the
ThinkVantage
Productivity
Center
program.
To
erase
a
forgotten
password:
1.
Remove
the
computer
cover.
See“Removing
the
cover”
on
page
22.
2.
You
might
have
to
access
the
system
board
components.
See
“Accessing
system
board
components”
on
page
24.
3.
Locate
the
Clear
CMOS/Recovery
jumper
on
the
system
board.
See
“Identifying
parts
on
the
system
board”
on
page
25.
4.
Move
the
jumper
from
the
standard
position
(pins
1
and
2)
to
the
maintenance
or
configure
position
(pins
2
and
3).
5.
Replace
the
computer
cover
and
connect
the
power
cord.
See
“Replacing
the
cover
and
connecting
the
cables”
on
page
39.
38
User
Guide