IBM 4800-741 Hardware Service Guide - Page 99

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Updated July 14, 2008 Figure 67. Location of CMOS jumper-Model 741 and 781 Figure 68. Location of CMOS jumper-Model 721 3. See A in Figure 67 or B in Figure 68 to locate your CMOS jumper on the planar. See Table 7 for the correct pins and position to clear your CMOS settings. Table 7. CMOS jumper and pin location by model Model CMOS Jumper Pins for normal operation Pins to clear CMOS 721 JP5 741, 781 JP4 1-2 2-3 4. Move the pins to position 2-3 and wait for 5 seconds. 5. Return the pins to position 1-2. 6. Re-plug the AC cord and power-on the system. Your system now has the default CMOS settings. Note: Restoring the CMOS default settings may be necessary if a password is lost or forgotten. Chapter 4. Diagnostics and configuration settings 81

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3.
See
±A²
in
Figure
67
or
±B²
in
Figure
68
to
locate
your
CMOS
jumper
on
the
planar.
See
Table
7
for
the
correct
pins
and
position
to
clear
your
CMOS
settings.
Table
7.
CMOS
jumper
and
pin
location
by
model
Model
CMOS
Jumper
Pins
for
normal
operation
Pins
to
clear
CMOS
721
JP5
1-2
2-3
741,
781
JP4
4.
Move
the
pins
to
position
2-3
and
wait
for
5
seconds.
5.
Return
the
pins
to
position
1-2.
6.
Re-plug
the
AC
cord
and
power-on
the
system.
Your
system
now
has
the
default
CMOS
settings.
Note:
Restoring
the
CMOS
default
settings
may
be
necessary
if
a
password
is
lost
or
forgotten.
Figure
67.
Location
of
CMOS
jumper—Model
741
and
781
Figure
68.
Location
of
CMOS
jumper—Model
721
Updated
July
14,
2008
Chapter
4.
Diagnostics
and
configuration
settings
81