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System-board switches and jumpers

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

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 blockSwitch numberSwitch nameUsage description
1 SW21Machine Engine (ME) firmware security overrideME update modeNormal (default)
2N/AAccessed by technician onlyNormal (default)
2 SW81Password overrideOverrides the power-on passwordNormal (default)
2XClarity Controller force updateEnables XClarity Controller force updateNormal (default)
3XClarity Controller boot backupThe node will boot by using a backup of the XClarity Controller firmwareNormal (default)
4Low securityEnable low securityNormal (default)
3 SW11TPM physical presenceIndicates a physical presence to the system TPMNormal (default)
2CMOS clearClears the real-time clock (RTC) registryNormal (default)
The following table describes the jumper on the system board.
Table 2. System-board jumpers
Jumper nameJumper 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.