IBM 79463AU, Installation And User Manual

Page: 56 / 142

The following table describes the functions of the SW3 switch block on the Pass 8
level system board:
Table 5. Pass 8 level system board SW3 switch block definition
Switch
number
Default position Description
1 Off Clear CMOS memory. When this
switch is toggled to On, it clears the
data in CMOS memory, which clears
the power-on password.
2 Off Reserved.
3 Off Reserved.
4 Off Reserved.
5 Off Power-on password override.
Changing the position of this switch
bypasses the power-on password
check the next time the server is
turned on and starts the Setup utility
so that you can change or delete the
power-on password. You do not have
to move the switch back to the
default position after the power-on
password in overridden.
Changing the position of this switch
does not affect the administrator
password check if an administrator
password is set.
See “Passwords” on page 94 for
additional information about
passwords.
6 Off When you toggle this switch On and
then Off, you force a power-on,
which overrides the power-on and
power-off button on the server and
they become nonfunctional.
7 Off Reserved.
8 Off Reserved.
Important:
1. Before you change any switch settings or move any jumpers, turn off the server;
then, disconnect all power cords and external cables. Review the information in
vii, “Installation guidelines” on page 46, “Handling static-sensitive devices” on
page 48, and “Turning off the server” on page 33.
2. Any system-board switch or jumper blocks that are not shown in the illustrations
in this document are reserved.
Pass 9 level system board
If your server has the Pass 9 level system board, the following illustration shows the
location and description of the switches and jumpers. To determine if your system
board is a pass 9 level system board, you will see P9 (with a part number to the
right of it) on the corner of the system board near the USB connectors on the rear
of the server, as shown in the following illustration.
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IBM System x3550 M2 Types 4198 and 7946: Installation and User’s Guide