Table 6. System board SW4 switch block definition
Switch number
Default position Description
1
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 520 for additional
information about passwords.
2
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.
3
Off (Trained service technician only) Forced power
permission. Changing the position of this switch
overrides the IMM power-on checking process.
4
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 v, “Installation guidelines”
on page 417
, “Handling static-sensitive devices” on page 419, and “Turning off the server” on page 16.
2. Any system-board switch or jumper blocks that are not shown in the illustrations in this document are
reserved.
System-board LEDs
The following illustration shows the light-emitting diodes (LEDs) on the system board.
Chapter 2. The Lenovo System x3550 M3 server 21
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