Table 6. System board jumpers (continued)
Jumper number Jumper name Jumper setting
Table notes:
1. If no jumper is present, the server responds as if the pins are set to 1 and 2.
2. Changing the position of the UEFI boot recovery jumper (J29) from pins 1 and 2 to pins
2 and 3 before the server is turned on alters which flash ROM page is loaded. Do not
change the jumper pin position after the server is turned on. This can cause an
unpredictable problem.
The following table describes the functions of the SW3 switch block on the system
board.
Table 7. 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.
2 Off Trust Platform Module (TPM)
physical presence. Turning this
switch to the on position indicates a
physical presence to the TPM.
3 Off Reserved.
4 Off Reserved.
The following table describes the functions of the SW4 switch block on the system
board.
Table 8. 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 116 for
additional information about
passwords.
40 IBM System x3550 M3 Type 4254 and 7944: Installation and User's Guide
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