Table 4. System-board SW7 switch block descriptions (continued)
Switch
number Default position Description
6 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 147 for
additional information about
passwords.
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 “Safety” on page vii, “Installation guidelines” on page 35,
“Handling static-sensitive devices” on page 37, and “Turning off the server” on
page 22.
2. Any system-board switch or jumper blocks that are not shown in the
illustrations in this document are reserved.
The following table describes the functions of the buttons on the system board:
Table 5. Buttons on the server
Button name Function
Light path button Press this button to light the LEDs on the
system board when the power source has
been removed from the server.
Force NMI button This button is on the rear of the server. Press
this button to force a nonmaskable interrupt
to the microprocessor. You might have to use
a pen or the end of a straightened paper clip
to press the button. You can also use it to
force a blue-screen memory dump (use this
button only when you are directed to do so
by IBM Support).
32 System x3750 M4 Types 8722 and 8733: Installation and Service Guide
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