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The following table describes the function of each pin on the SW6 switch block.
26
System x3400 M2 Types 7836 and 7837: Installation and User's Guide
Table 2. System board jumpers (continued)
Jumper number
JP6
Notes:
v If no jumper is present, the server responds as if the pins are set to 1 and 2.
v 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.
Table 3. System board switches
Switch pin number
1
2
3
Jumper name
UEFI boot recovery jumper
Default value
Off
Off
Off
Jumper setting
v Pins 1 and 2: Normal
(default) - Loads the
primary server firmware
ROM.
v Pins 2 and 3: This enables
the server to recovery if
the server firmware
becomes damaged.
Description
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
is overridden.
Changing the position of this
switch does not affect the
administrator password check
if an administrator password
is set.
Attention:
If you set an
administrator password and
then forget it, there is no way
to change, override, or
remove it. You must replace
the system board.
See "Passwords" on page
110 for additional information
about passwords.
Reserved.
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