IBM System x3750 M4 Type 8722 Installation And Service Manual page 45

Table 2. System-board jumpers (continued)
Jumper number
J86
J115
Note:
1. If no jumper is present, the server responds as if the pins are set to the default.
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.
The following table describes the functions of the SW7 switch block on the system
board.
Table 3. System-board SW7 switch block descriptions
Switch
number Default position
1 Off
2 Off
3 Off
4 Off
5 Off
Jumper name
IMM low security jumper
IMM recovery jumper
Description
Reserved
Clear CMOS memory. When this
switch is toggled to On, it clears the
data in CMOS memory, which clears
the power-on password.
Reserved
Reserved
Reserved
Chapter 2. Installing optional devices
Jumper setting
v Pins 1 and 2: Removes the
security check, allowing
unsigned IMM2 firmware.
v Pins 2 and 3: (default)
Allows only signed IMM2
firmware to be flashed.
v Pins 1 and 2: (default)
Loads the primary IMM
firmware ROM page.
v Pins 2 and 3: Loads the
secondary (backup) IMM
firmware ROM page.
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