Figure 17. System-board switches, jumpers, and buttons
The following table describes the jumpers on the system board.
Table 2. System board jumpers
Jumper number
Jumper name
Jumper setting
JP1
CMOS clear jumper
• Pins 1 and 2: Normal (default).
• Pins 2 and 3: Clears the real-time clock (RTC)
registry.
JP2
UEFI boot backup jumper
• Pins 1 and 2: Normal (default). Loads the
primary server firmware ROM page.
• Pins 2 and 3: Loads the secondary (backup)
server firmware ROM page.
JP6
System TPM physical presence
jumper
• Pins 1 and 2: Normal (default).
• Pins 2 and 3: Indicates a physical presence to
the system TPM.
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 (JP2) 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 SW3 switch block on the system board.
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System x3550 M4 Installation and Service Guide
Summary of Contents for x3550 M4
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