Lenovo System x3550 M5, Installation And Service Manual

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The following table describes the functions of the SW3 switch block on the system board.
Table 2. System board SW3 switch block definition
Switch number Default position Description
1
Off
Reserved.
2 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 the user security section in “Setup Utility menu choices” on
page 37 for additional information about passwords.
3
Off
Reserved
4 Off Reserved
The following table describes the functions of the SW11 switch block on the system board.
Table 3. System board SW11 switch block definition
Switch number Default position Description
1 Off Indicates a physical presence to the system TPM
2
Off
Reserved
The following table describes the functions of the button on the system board.
Table 4. Button on the server
Button name Function
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 Lenovo Support).
System-board LEDs
The following illustration shows the light-emitting diodes (LEDs) on the system board.
Chapter 1
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The Lenovo System x3550 M5 server
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