Lenovo ThinkCentre M50 User Manual - Page 120

Recovering, POST/BIOS, update, failure

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6. Scroll down and look for a .txt file that has instructions for Flash BIOS update from the operating system. Click the .txt file. 7. Print these instructions. This is very important since they are not on the screen after the download begins. 8. 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 cover. See Removing the cover in the chapter for your model. 3. Locate the Clear CMOS/Recovery jumper on the system board. See Identifying parts on the system board in the chapter for your model type. 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 cover. See Replacing the cover and connecting the cables in the chapter for your model type. 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. After the update session is completed, there will be no video and the series of beeps will end. Remove the diskette from the diskette drive, and turn off the computer and monitor. 10. Unplug the power cords from electrical outlets. 11. Remove the cover. See Removing the cover in the chapter for your model type. 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 cover and reconnect any cables that were disconnected. 16. Turn on the computer to restart the operating system. 104 User Guide

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6.
Scroll
down
and
look
for
a
.txt
file
that
has
instructions
for
Flash
BIOS
update
from
the
operating
system.
Click
the
.txt
file.
7.
Print
these
instructions.
This
is
very
important
since
they
are
not
on
the
screen
after
the
download
begins.
8.
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
cover.
See
Removing
the
cover
in
the
chapter
for
your
model.
3.
Locate
the
Clear
CMOS/Recovery
jumper
on
the
system
board.
See
Identifying
parts
on
the
system
board
in
the
chapter
for
your
model
type.
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
cover.
See
Replacing
the
cover
and
connecting
the
cables
in
the
chapter
for
your
model
type.
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.
After
the
update
session
is
completed,
there
will
be
no
video
and
the
series
of
beeps
will
end.
Remove
the
diskette
from
the
diskette
drive,
and
turn
off
the
computer
and
monitor.
10.
Unplug
the
power
cords
from
electrical
outlets.
11.
Remove
the
cover.
See
Removing
the
cover
in
the
chapter
for
your
model
type.
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
cover
and
reconnect
any
cables
that
were
disconnected.
16.
Turn
on
the
computer
to
restart
the
operating
system.
104
User
Guide