IBM 8835 Hardware Maintenance Manual - Page 33

Clearing, memory

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v If a supervisor password has been set and is known, type the supervisor password at the password prompt (see the User's Guide for more information about passwords). Start the Configuration/Setup Utility program and reset the user password. v Remove the server battery and then reinstall it (see "Replacing the battery" on page 42). v Change the position of the clear CMOS jumper on the system board to bypass the password check (see "Clearing CMOS memory"). Clearing CMOS memory The CMOS recovery jumper is used to clear CMOS memory in the event you lose your user or supervisor password. This jumper is also used to recover from a BIOS failure. See "Recovering from a POST/BIOS update failure" on page 21. Attention: Do not change settings or move jumpers on any system-board switch or jumper blocks that are not shown in this book. Complete the following steps to set the CMOS recovery jumper and erase a forgotten password: 1. Review the "Safety information" on page 101 and "Handling static-sensitive devices" on page 25. 2. Turn off the server and all attached devices. 3. Disconnect all power cords and external cables. 4. Remove the cover (see "Removing the cover and bezel" on page 27). 5. Locate the CMOS recovery jumper (JBAT1) on the system board, removing any adapters that impede access to the jumper. The following illustration shows the location of the jumper on the system board. Clear CMOS jumper (JBAT1) 6. Change the position of the jumper on JBAT1 to bypass the password check. Chapter 3. Diagnostics 23

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v
If
a
supervisor
password
has
been
set
and
is
known,
type
the
supervisor
password
at
the
password
prompt
(see
the
User’s
Guide
for
more
information
about
passwords).
Start
the
Configuration/Setup
Utility
program
and
reset
the
user
password.
v
Remove
the
server
battery
and
then
reinstall
it
(see
“Replacing
the
battery”
on
page
42).
v
Change
the
position
of
the
clear
CMOS
jumper
on
the
system
board
to
bypass
the
password
check
(see
“Clearing
CMOS
memory”).
Clearing
CMOS
memory
The
CMOS
recovery
jumper
is
used
to
clear
CMOS
memory
in
the
event
you
lose
your
user
or
supervisor
password.
This
jumper
is
also
used
to
recover
from
a
BIOS
failure.
See
“Recovering
from
a
POST/BIOS
update
failure”
on
page
21.
Attention:
Do
not
change
settings
or
move
jumpers
on
any
system-board
switch
or
jumper
blocks
that
are
not
shown
in
this
book.
Complete
the
following
steps
to
set
the
CMOS
recovery
jumper
and
erase
a
forgotten
password:
1.
Review
the
“Safety
information”
on
page
101
and
“Handling
static-sensitive
devices”
on
page
25.
2.
Turn
off
the
server
and
all
attached
devices.
3.
Disconnect
all
power
cords
and
external
cables.
4.
Remove
the
cover
(see
“Removing
the
cover
and
bezel”
on
page
27).
5.
Locate
the
CMOS
recovery
jumper
(JBAT1)
on
the
system
board,
removing
any
adapters
that
impede
access
to
the
jumper.
The
following
illustration
shows
the
location
of
the
jumper
on
the
system
board.
Clear CMOS jumper (JBAT1)
6.
Change
the
position
of
the
jumper
on
JBAT1
to
bypass
the
password
check.
Chapter
3.
Diagnostics
23