Lenovo ThinkCentre M55e Hardware Maintenance Manual - Page 204

Updating, flashing, diskette, Recovering, POST/BIOS, update, failure

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Updating (flashing) BIOS from a diskette 1. Insert a system program update (flash) diskette into the diskette drive. system program updates are available at http://www.lenovo.com/support on the World Wide Web. 2. Turn on the computer. If it is already on, you must turn it off and back on. The update begins. 3. 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. Turn the computer off and insert the special recovery BIOS flash diskette in the diskette drive. 2. Turn the computer on. 3. The recovery session takes two to three minutes. During this time you will hear a series of beeps. After the update session completes, the series of beeps ends and the computer automatically turns off. There is no video during the recovery session. 4. Remove the special recovery BIOS flash diskette from the diskette drive. 198 Hardware Maintenance Manual

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Updating
(flashing)
BIOS
from
a
diskette
1.
Insert
a
system
program
update
(flash)
diskette
into
the
diskette
drive.
system
program
updates
are
available
at
on
the
World
Wide
Web.
2.
Turn
on
the
computer.
If
it
is
already
on,
you
must
turn
it
off
and
back
on.
The
update
begins.
3.
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.
Turn
the
computer
off
and
insert
the
special
recovery
BIOS
flash
diskette
in
the
diskette
drive.
2.
Turn
the
computer
on.
3.
The
recovery
session
takes
two
to
three
minutes.
During
this
time
you
will
hear
a
series
of
beeps.
After
the
update
session
completes,
the
series
of
beeps
ends
and
the
computer
automatically
turns
off.
There
is
no
video
during
the
recovery
session.
4.
Remove
the
special
recovery
BIOS
flash
diskette
from
the
diskette
drive.
198
Hardware
Maintenance
Manual