Skip to main content

System-board-assembly switches

The following illustration indicates the location of the switches on the server.

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 following information:

  2. Any system-board-assembly switch or jumper block that is not shown in the illustrations in this document are reserved.
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-assembly switches
System-board-assembly switches
1 SW32 SW4

SW3 switch block

The following table describes the functions of the SW3 switch block on the system board assembly.
Table 1. System-board-assembly SW3 switch block description
Switch numberDefault positionDescription
1OffReserved
2OffChanging 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.
3OffChanging 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.

4OffChanging the switch to the On position to enable ME boots to recovery.
5OffReserved
6OffReserved
7OffReserved
8OffReserved

SW4 switch block

The following table describes the functions of the SW4 switch block on the system board assembly.
Table 2. System-board-assembly SW4 switch block description
Switch numberDefault positionDescription
1OffWhen 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.
2OffChanging 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.
3OffReserved
4OffChanging the switch to the On position resets the XClarity Controller.
5OffReserved
6OffReserved
7OffReserved
8OffReserved