IMM low security
jumper (J86 )
UEFI boot
recovery
jumper (J71)
Light path
button
Force NMI
button
SW7
switch block
IMM recovery
jumper (J115 )
The following table describes the jumpers on the system board.
Table 2. System-board jumpers
Jumper number
Jumper name
Jumper setting
J71
UEFI boot recovery jumper
• Pins 1 and 2: (default) Loads the
primary UEFI firmware ROM page.
• Pins 2 and 3: Loads the secondary
(backup) UEFI firmware ROM
page.
J86
IMM low security jumper
• Pins 1 and 2: Removes the security
check, allowing unsigned IMM2
firmware.
• Pins 2 and 3: (default) Allows
only signed IMM2 firmware to be
flashed.
J115
IMM recovery jumper
• Pins 1 and 2: (default) Loads the
primary IMM firmware ROM page.
• Pins 2 and 3: Loads the secondary
(backup) IMM firmware ROM page.
Notes:
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.
30
Lenovo System x3750 M4 Installation and Service Guide
Summary of Contents for System x3750 M4
Page 1: ...Lenovo System x3750 M4 Installation and Service Guide Machine Type 8753 ...
Page 6: ...iv Lenovo System x3750 M4 Installation and Service Guide ...
Page 144: ...130 Lenovo System x3750 M4 Installation and Service Guide ...
Page 170: ...156 Lenovo System x3750 M4 Installation and Service Guide ...
Page 319: ...Adapter SAS signal connector SAS signal cable Chapter 6 Removing and replacing components 305 ...
Page 321: ...Adapter SAS signal connector SAS signal cable Chapter 6 Removing and replacing components 307 ...
Page 324: ...8x2 5 inch backplane 310 Lenovo System x3750 M4 Installation and Service Guide ...
Page 492: ...478 Lenovo System x3750 M4 Installation and Service Guide ...
Page 522: ...508 Lenovo System x3750 M4 Installation and Service Guide ...
Page 956: ...942 Lenovo System x3750 M4 Installation and Service Guide ...
Page 960: ...946 Lenovo System x3750 M4 Installation and Service Guide ...
Page 968: ...Taiwan BSMI RoHS declaration 954 Lenovo System x3750 M4 Installation and Service Guide ...
Page 981: ......
Page 982: ...Part Number 00MV562 Printed in China 1P P N 00MV562 1P00MV562 ...