Skip to main content

System-board switches

Use this information to locate the system-board switches.

The following illustration shows the location of the switch blocks on the system board.


Graphic illustrating system board switches
Note
Any system-board switches or jumpers that are not described in this section are reserved.
Switch and jumper functions are as follows:
  • All jumpers on the system board are reserved and should be removed.
  • All switches on switch block SW3 are reserved and should be in the Off position.
  • All switches on switch block SW5 are reserved. Switches SW5-1, SW5-3, and SW5-4 should be in the Off position. Switch SW5-2 should be in the On position.

  • The following table describes the functions of the switches on switch block SW6.

    Table 1. System-board switch block SW6
    Switch numberDescriptionDefinition
    SW6-1Password overrideThe default position is Off. Changing this switch to the On position overrides the power-on password.
    SW6-2Trusted Platform Module (TPM) physical presenceThe default position is Off. Changing this switch to the On position indicates a physical presence to the TPM.
    SW6-3Real time clock (RTC) resetThe default position is Off. Changing this switch to the On position resets the RTC. A momentary toggle is all that is required. To avoid excessive CMOS battery drain, do not leave this switch in the On position.
    SW6-4Boot backup IMM2When the switch is in the default Off position, the compute node will boot by using the primary IMM2 firmware. When the switch is in the On position, the compute node will boot by using a backup of the IMM2 firmware.
    SW6-5Boot backup UEFIThe default position is Off. Changing this switch to the On position forces the compute node to boot from the backup UEFI image.
    SW6-6iBMC force updateThe default position is Off. Changing this switch to the On position bypasses the operational firmware image and performs a BMC firmware update, if the normal firmware update procedure results in an inoperative BMC.
    Note
    Use this switch only if the normal firmware update procedure fails and the operational firmware image is corrupted. Use of this switch disables normal baseboard management controller operation.
    SW6-7ReservedThe default position is Off.
    SW6-8IMM Trusted Platform Module (TPM) physical presenceThe default position is Off. Changing this switch to the On position indicates a physical presence to the IMM TPM.