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System-board switches and jumpers
The following illustration shows the location and description of the switches and
jumpers.
Note: If there is a clear protective sticker on the top of the switch blocks, you must
remove and discard it to access the switches.
System TPM physical
presence jumper
Light path button
UEFI boot backup
jumper
Table 2. System board jumpers
Jumper number
Jumper name
JP1
CMOS clear jumper
JP3
UEFI boot backup jumper
JP5
System TPM physical
presence jumper
PW_CLR1
Password clear jumper
Note: 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.
IMM TPM physical
presence jumper
CMOS clear jumper
CMOS password jumper
Jumper setting
v Pins 1 and 2: Normal (default).
v Pins 2 and 3: Clears the real-time
clock (RTC) registry.
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.
v Pins 1 and 2: Normal (default).
v Pins 2 and 3: Indicates a physical
presence to the system TPM.
v Pins 1 and 2: Normal (default).
v Pins 2 and 3: Clear password
registers.
Chapter 2. Introduction
13
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