IBM System x3650 M5, Installation And Service Manual, Page: 47 / 1010

The following table describes the jumpers on the system board.
Table 1. System board jumpers
Jumper number Jumper name Jumper setting
J7 System TPM physical
presence jumper
v
Pins 1 and 2: Normal (default).
v
Pins 2 and 3: Indicates a physical
presence to the system TPM.
J11 CMOS clear jumper
v
Pins 1 and 2: Normal (default).
v
Pins 2 and 3: Clears the real-time
clock (RTC) registry.
J15 UEFI boot backup jumper
v
Pins 1 and 2: Normal (default).
Loads the primary server firmware
ROM page.
v
Pins 2 and 3: Loads the secondary
(backup) server 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 backup jumper (J15) 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 SW6 switch block on the system
board.
1
2
3
4
5
6
7
8
1
2
3
1
2
3
System TPM physical
presence jumper
CMOS clear jumper
UEFI boot backup jumper
Switch block 6 (SW6)
Figure 27. System-board switches, jumpers, and buttons
Chapter 1. The System x3650 M5 server
31