Updating
(flashing)
BIOS
from
a
CD-ROM
or
diskette
This
section
describes
how
to
update
(flash)
the
BIOS
using
a
CD-ROM
or
diskette.
system
program
updates
are
available
at
http://www.lenovo.com/support
on
the
World
Wide
Web.
1.
To
update
(flash)
the
BIOS:
v
If
using
a
CD-ROM,
make
sure
the
computer
is
turned
on.
Insert
the
system
program
update
(flash)
CD-ROM
into
the
optical
drive.
The
update
begins.
v
If
using
a
diskette,
make
sure
the
computer
is
turned
off.
Insert
the
system
program
update
(flash)
diskette
and
turn
on
the
computer.
The
update
begins.
2.
When
you
are
prompted
to
select
a
language,
press
the
number
on
your
keyboard
that
corresponds
to
the
language
and
then
press
Enter
.
3.
When
prompted
to
change
the
serial
number,
press
Y
.
4.
Type
the
seven-character
serial
number
of
your
computer
and
then
press
Enter
.
5.
When
prompted
to
change
the
machine
type/model,
press
Y
.
6.
Type
the
seven-character
machine
type/model
of
your
computer
and
then
press
Enter
.
7.
Follow
the
instructions
on
the
screen
to
complete
the
update.
Recovering
from
a
POST/BIOS
update
failure
Attention:
If
an
interruption
occurs
during
a
POST/BIOS
update
(flash
update),
the
computer
might
not
restart
correctly.
If
this
occurs,
perform
the
following
procedure
(also
known
as
a
Boot-block
recovery).
Note:
If
your
computer
has
no
internal
diskette
drive,
an
optional
USB
diskette
drive
must
be
connected
to
use
the
BIOS
flash
diskette.
1.
Remove
power
from
the
system
and
open
the
cover.
2.
Remove
any
parts
necessary
to
gain
access
to
the
Clear
CMOS/Recovery
jumper.
3.
Move
the
Clear
CMOS/Recovery
jumper
from
the
standard
position
(pins
1
and
2)
to
pins
2
and
3.
4.
Insert
the
BIOS
flash
diskette
in
the
diskette
drive.
5.
Close
the
cover
and
reconnect
the
computer
power
cord
to
the
computer
and
to
an
electrical
outlet.
Turn
on
the
computer.
6.
The
recovery
session
takes
two
to
three
minutes
and
starts
with
two
short
beeps.
Video
will
be
displayed
after
a
short
period,
indicating
that
the
recovery
process
has
started.
7.
When
the
flash
recovery
completes
and
the
computer
turns
off,
unplug
the
computer
and
open
the
cover.
8.
Move
the
Clear
CMOS/Recovery
jumper
back
to
the
original
position
(pins
1
and
2).
9.
Remove
the
BIOS
flash
diskette
from
the
diskette
drive.
10.
Close
or
install
the
cover
and
reconnect
all
external
cables.
11.
Plug
in
computer
and
power
on.
442
Hardware
Maintenance
Manual
Содержание ThinkCentre M57
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