IBM 4846-545 Service Guide - Page 37

Restoring, default, settings, Clearing

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PC Health Status This is an information window that provides the CPU and system temperatures, voltages on the system board, and fan speed. Load Defaults This selection resets all options to their default configuration. Set Password Use the password options menu to set, change, or clear the system password. Restoring the default CMOS settings To restore CMOS default settings, select Load Optimized Settings from the main menu. Clearing the CMOS settings The SurePOS 500 uses battery-backed CMOS memory to store system settings. If the CMOS memory becomes corrupted and the system does not boot, you can restore the factory default values by following these steps: 1. Power off the system and disconnect the AC power. 2. Locate the CMOS reset jumper (J25) on the system board. See A in Figure 6. A Figure 6. CMOS reset jumper J25 3. Remove the jumper, which is normally located on pins 1 and 2. (Pin 1 is located near the edge of the board, while pin 3 is closest to the memory sockets.) 4. Place the jumper on pins 2 and 3 and wait for 5 seconds. This resets the CMOS. 5. Return the jumper to pins 1 and 2. 6. Power ON the system. 7. When you restart the system after resetting the CMOS, the following error message is displayed: CMOS checksum error - defaults loaded Chapter 2. Running diagnostics and troubleshooting 15

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PC
Health
Status
This
is
an
information
window
that
provides
the
CPU
and
system
temperatures,
voltages
on
the
system
board,
and
fan
speed.
Load
Defaults
This
selection
resets
all
options
to
their
default
configuration.
Set
Password
Use
the
password
options
menu
to
set,
change,
or
clear
the
system
password.
Restoring
the
default
CMOS
settings
To
restore
CMOS
default
settings,
select
Load
Optimized
Settings
from
the
main
menu.
Clearing
the
CMOS
settings
The
SurePOS
500
uses
battery-backed
CMOS
memory
to
store
system
settings.
If
the
CMOS
memory
becomes
corrupted
and
the
system
does
not
boot,
you
can
restore
the
factory
default
values
by
following
these
steps:
1.
Power
off
the
system
and
disconnect
the
AC
power.
2.
Locate
the
CMOS
reset
jumper
(J25)
on
the
system
board.
See
±A²
in
Figure
6.
3.
Remove
the
jumper,
which
is
normally
located
on
pins
1
and
2.
(Pin
1
is
located
near
the
edge
of
the
board,
while
pin
3
is
closest
to
the
memory
sockets.)
4.
Place
the
jumper
on
pins
2
and
3
and
wait
for
5
seconds.
This
resets
the
CMOS.
5.
Return
the
jumper
to
pins
1
and
2.
6.
Power
ON
the
system.
7.
When
you
restart
the
system
after
resetting
the
CMOS,
the
following
error
message
is
displayed:
CMOS
checksum
error
-
defaults
loaded
A
Figure
6.
CMOS
reset
jumper
J25
Chapter
2.
Running
diagnostics
and
troubleshooting
15