System-board switches and jumpers

The following illustrations show the location of the switches and jumpers on the server.

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.
Figure 1. System-board switches
System-board switches

The following table describes the switches on the system board.

Table 1. System-board jumpers
Switches block Switch number Switch name Usage description
On off
1 SW2 1 Machine Engine (ME) firmware security override ME update mode Normal (default)
2 N/A Accessed by technician only Normal (default)
2 SW8 1 Password override Overrides the power-on password Normal (default)
2 XClarity Controller force update Enables XClarity Controller force update Normal (default)
3 XClarity Controller boot backup The node will boot by using a backup of the XClarity Controller firmware Normal (default)
4 Low security Enable low security Normal (default)
3 SW1 1 TPM physical presence Indicates a physical presence to the system TPM Normal (default)
2 CMOS clear Clears the real-time clock (RTC) registry Normal (default)
The following table describes the jumper on the system board.
Table 2. System-board jumpers
Jumper name Jumper setting
4 Serial select jumper
  • Pins 1 and 2: Send UEFI debug message to serial port (default)

  • Pins 2 and 3: Sends the XCC to the serial port.

  1. Before you change any switch settings or move any jumpers, turn off the server; then, disconnect all power cords and external cables. Review the information in Safety Information page, Installation Guidelines, Handling static-sensitive devices, and Power off the server.
  2. Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.