Lenovo ThinkCentre M51 User Manual - Page 46

Recovering, POST/BIOS, update, failure

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1. From your browser, type http://www.lenovo.com/think/support in the address field and press Enter. 2. Locate the Downloadable files for your machine type as follows: a. In the Use Quick path field, type in your machine type and click Go. b. Under Browse by product, click Continue. c. Under Important information, click Downloads and drivers. d. In BIOS category, click Flash BIOS update. e. Click the .txt file that contains the Installation instructions for Flash BIOS update (Flash from the operating system version). 3. Print these instructions. This is very important since 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 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 (also known as a 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 cover" on page 10. 3. Locate the Clear CMOS/Recovery jumper on the system board. See "Identifying parts on the system board" on page 11. 4. If necessary, refer to Installing adapters to remove any adapters that impede access to the Clear CMOS/Recovery jumper. 5. Move the jumper from the standard position (pins 1 and 2) to pins 2 and 3. 6. Replace the computer cover. See "Replacing the cover and connecting the cables" on page 24. 7. Reconnect the power cords for the computer and monitor to electrical outlets. 8. Insert the POST/BIOS update (flash) diskette into drive A, and turn on the computer and the monitor. 9. The recovery session will take two to three minutes. During this time you will hear a series of beeps. After the update session is completed, there will be no video and the series of beeps will end, and the system will automatically turn off. Remove the diskette from the diskette drive. 10. Unplug the power cords from electrical outlets. 11. Remove the computer cover. See "Removing the cover" on page 10. 12. Remove any adapters that impede access to the BIOS Configuration jumper. 13. Replace the Clear CMOS/Recovery jumper to its original position. 14. Replace any adapters that were removed. 15. Replace the computer cover and reconnect any cables that were disconnected. 16. Turn on the computer to restart the operating system. 30 User Guide

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1.
From
your
browser,
type
in
the
address
field
and
press
Enter.
2.
Locate
the
Downloadable
files
for
your
machine
type
as
follows:
a.
In
the
Use
Quick
path
field,
type
in
your
machine
type
and
click
Go
.
b.
Under
Browse
by
product,
click
Continue
.
c.
Under
Important
information,
click
Downloads
and
drivers
.
d.
In
BIOS
category,
click
Flash
BIOS
update
.
e.
Click
the
.txt
file
that
contains
the
Installation
instructions
for
Flash
BIOS
update
(Flash
from
the
operating
system
version).
3.
Print
these
instructions.
This
is
very
important
since
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
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
(also
known
as
a
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
cover”
on
page
10.
3.
Locate
the
Clear
CMOS/Recovery
jumper
on
the
system
board.
See
“Identifying
parts
on
the
system
board”
on
page
11.
4.
If
necessary,
refer
to
Installing
adapters
to
remove
any
adapters
that
impede
access
to
the
Clear
CMOS/Recovery
jumper.
5.
Move
the
jumper
from
the
standard
position
(pins
1
and
2)
to
pins
2
and
3.
6.
Replace
the
computer
cover.
See
“Replacing
the
cover
and
connecting
the
cables”
on
page
24.
7.
Reconnect
the
power
cords
for
the
computer
and
monitor
to
electrical
outlets.
8.
Insert
the
POST/BIOS
update
(flash)
diskette
into
drive
A,
and
turn
on
the
computer
and
the
monitor.
9.
The
recovery
session
will
take
two
to
three
minutes.
During
this
time
you
will
hear
a
series
of
beeps.
After
the
update
session
is
completed,
there
will
be
no
video
and
the
series
of
beeps
will
end,
and
the
system
will
automatically
turn
off.
Remove
the
diskette
from
the
diskette
drive.
10.
Unplug
the
power
cords
from
electrical
outlets.
11.
Remove
the
computer
cover.
See
“Removing
the
cover”
on
page
10.
12.
Remove
any
adapters
that
impede
access
to
the
BIOS
Configuration
jumper.
13.
Replace
the
Clear
CMOS/Recovery
jumper
to
its
original
position.
14.
Replace
any
adapters
that
were
removed.
15.
Replace
the
computer
cover
and
reconnect
any
cables
that
were
disconnected.
16.
Turn
on
the
computer
to
restart
the
operating
system.
30
User
Guide