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System-board switches

The following illustrations show the location of the switches, jumpers, and buttons 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
Important
  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.

SW1 switch block​

The following table describes the functions of the SW1 switch block on the system board.
Table 1. System board SW1 switch block description
Switch numberDefault positionDescription
1OffReserved
2OffChanging this switch to the On position overrides the power-on password.

Changing the position of this switch does not affect the administrator password check if an administrator password is set.

3OffChanging this switch to the On position to bypass 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.
4OffReserved

SW2 switch block​

The following table describes the functions of the SW2 switch block on the system board.
Table 2. System board SW2 switch block description
Switch numberDefault positionDescription
1OffChanging the switch to the On position to enable ME boots to recovery.
2OffReserved
3OffChanging this switch to the On position to enable Power On.
4OffReserved

SW3 switch block​

The following table describes the functions of the SW3 switch block on the system board.
Table 3. System board SW3 switch block description
Switch numberDefault positionDescription
1OffReserved
2OffReserved
3OffReserved
4OffWhen the switch is in the default Off position, the server will boot by using the primary XClarity Controller firmware. Change this switch to the On position, to enable the server to boot by using a backup of the XClarity Controller firmware.

SW10 switch block​

The following table describes the functions of the SW10 switch block on the system board.
Table 4. System board SW10 switch block description
Switch numberDefault positionDescription
1OffChanging this switch to the On position to 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.
3OffReserved