IBM System x3690 X5 Installation And User Manual page 51

Table 3. System board jumper (continued)
Jumper number
Note:
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 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.
Light path button: Press this button to light the LEDs on the system board when
the power source has been removed from the server after the server automatically
shuts down because the cover was removed while the server was running.
The following table describes the functions of the SW2 switch block on the system
board:
Table 4. System board SW2 switch block definition
Switch
number Default position
1 Off
2 Off
3 Off
4 Off
5 Off
6 Off
7 Off
8 Off
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
Jumper name
Description
Clear CMOS memory. When this
switch is toggled to On, it clears the
data in CMOS memory, which clears
the power-on password.
Reserved.
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 137 for
additional information about
passwords.
Reserved
Reserved
Reserved
Reserved
Reserved
Chapter 2. Installing optional devices
Jumper setting
39