Lenovo 9935B3U User Manual - Page 64

Updating, flashing, operating, system, Recovering, POST/BIOS, update, failure

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5. Type in the seven character serial number of your computer and then press Enter. 6. When prompted to change the machine type/model, press Y. 7. Type in the seven character machine type/model of your computer and then press Enter. 8. Follow the instructions on the screen to complete the update. Updating (flashing) BIOS from your operating system Note: The Web page content (including the links referenced in the following procedure) is subject to change because of the constant improvements made to the Web site. 1. Go to: http://www.lenovo.com/support 2. Locate the Downloadable files for your machine type as follows: a. In the Enter a product field, type your machine type. b. Click Go → Continue → Downloads and drivers. c. Under the BIOS category, click the Flash BIOS update. d. Click the TXT file that contains the installation instructions for the flash BIOS update (flash from the operating system version). 3. Print these instructions. This is very important because they are not on the screen after the download begins. 4. From your browser, click Back to return to the list of files. Carefully follow the printed instructions to download, extract, and install the update. Recovering from a POST/BIOS update failure If the power to your computer is interrupted while POST/BIOS is being updated (flash update), your computer might not restart correctly. If this happens, perform the following procedure which is commonly called Boot-block recovery. 1. Turn off the computer and any attached devices, such as printers, monitors, and external drives. 2. Unplug all power cords from electrical outlets and remove the computer cover. See "Removing the computer cover" on page 14. 3. Access the system board. See "Accessing the system board components and drives" on page 15. 4. Locate the Clear CMOS/Recovery jumper on the system board. See "Locating parts on the system board" on page 11. 5. Remove any cables that might prevent your access to the Clear CMOS/Recovery jumper. 6. Move the jumper from the standard position (pin 1 and pin 2) to pin 2 and pin 3. 7. Reconnect any cables that were disconnected. See "Completing the parts replacement" on page 37. 8. Reinstall the computer cover and reconnect the power cords for the computer and monitor to electrical outlets. 9. Do one of the following: v Insert the POST/BIOS update (flash update) diskette into the diskette drive and turn on the computer and the monitor. 56 User Guide

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5.
Type
in
the
seven
character
serial
number
of
your
computer
and
then
press
Enter.
6.
When
prompted
to
change
the
machine
type/model,
press
Y.
7.
Type
in
the
seven
character
machine
type/model
of
your
computer
and
then
press
Enter.
8.
Follow
the
instructions
on
the
screen
to
complete
the
update.
Updating
(flashing)
BIOS
from
your
operating
system
Note:
The
Web
page
content
(including
the
links
referenced
in
the
following
procedure)
is
subject
to
change
because
of
the
constant
improvements
made
to
the
Web
site.
1.
Go
to:
2.
Locate
the
Downloadable
files
for
your
machine
type
as
follows:
a.
In
the
Enter
a
product
field,
type
your
machine
type.
b.
Click
Go
→
Continue
→
Downloads
and
drivers
.
c.
Under
the
BIOS
category,
click
the
Flash
BIOS
update.
d.
Click
the
TXT
file
that
contains
the
installation
instructions
for
the
flash
BIOS
update
(flash
from
the
operating
system
version).
3.
Print
these
instructions.
This
is
very
important
because
they
are
not
on
the
screen
after
the
download
begins.
4.
From
your
browser,
click
Back
to
return
to
the
list
of
files.
Carefully
follow
the
printed
instructions
to
download,
extract,
and
install
the
update.
Recovering
from
a
POST/BIOS
update
failure
If
the
power
to
your
computer
is
interrupted
while
POST/BIOS
is
being
updated
(flash
update),
your
computer
might
not
restart
correctly.
If
this
happens,
perform
the
following
procedure
which
is
commonly
called
Boot-block
recovery.
1.
Turn
off
the
computer
and
any
attached
devices,
such
as
printers,
monitors,
and
external
drives.
2.
Unplug
all
power
cords
from
electrical
outlets
and
remove
the
computer
cover.
See
“Removing
the
computer
cover”
on
page
14.
3.
Access
the
system
board.
See
“Accessing
the
system
board
components
and
drives”
on
page
15.
4.
Locate
the
Clear
CMOS/Recovery
jumper
on
the
system
board.
See
“Locating
parts
on
the
system
board”
on
page
11.
5.
Remove
any
cables
that
might
prevent
your
access
to
the
Clear
CMOS/Recovery
jumper.
6.
Move
the
jumper
from
the
standard
position
(pin
1
and
pin
2)
to
pin
2
and
pin
3.
7.
Reconnect
any
cables
that
were
disconnected.
See
“Completing
the
parts
replacement”
on
page
37.
8.
Reinstall
the
computer
cover
and
reconnect
the
power
cords
for
the
computer
and
monitor
to
electrical
outlets.
9.
Do
one
of
the
following:
v
Insert
the
POST/BIOS
update
(flash
update)
diskette
into
the
diskette
drive
and
turn
on
the
computer
and
the
monitor.
56
User
Guide