Table 3. System board SW4 switch block definition (continued)
Switch
number Switch name
Default
position
Description
3
Power-on password
override
Off
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 when on.
Notes:
1. You do not have to move the switch back to the default
position after the power-on password in overridden.
2. Changing the position of this switch does not affect the
administrator password check if an administrator password
is set. See “Passwords” on page 111 for additional
information about passwords.
4
CMOS clear
Off
Clears CMOS memory when on.
Notes:
1. Before you change any switch settings or move any jumpers, turn off the server. Review the information
in “Safety” on page v, “Installation guidelines” on page 35, “Handling static-sensitive devices” on
page 37, and “Turning off the server” on page 23.
2. Any system-board switch or jumper block that is not shown in the illustrations in this document are
reserved.
System-board LEDs and controls
The following illustration shows the light-emitting diodes (LEDs) on the system board.
Any error LED can be lit after ac power has been removed from the system-board tray so that you can
isolate a problem. After ac power has been removed from the system-board tray, power remains available
to these LEDs for up to 90 seconds. To view the error LEDs, press and hold the light path button on the
system board to light the error LEDs. The error LEDs that were lit while the system-board tray was running
will be lit again while the button is pressed.
The following illustration shows the LEDs and controls on the system board.
31
Summary of Contents for System x3500 M4
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