System-board-assembly switches

The following illustrates locations and functions of the switch block on the on the system board assembly which contains the system I/O board and processor board.

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:

   • Safety Information page

   • Installation Guidelines

   • Handling static-sensitive devices

   • Power off the server

2. Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.

Figure 1. System-board-assembly switch blocks

1 SW2

2 SW6

SW2 switch block

Table 1. SW2 switch block

Switch block	Switch number	Switch name	Default position	Description
	SW2-1	FPGA reset	OFF	Forces FPGA into reset when changing it to the ON position.
	SW2-2	Force BMC CPU reset	OFF	Forces BMC and CPU into reset when changing it to the ON position.
	SW2-3	BIOS advance function	OFF	Enables BIOS advance function when changing it to the ON position.
	SW2-4	BIOS image swap	OFF	Enables BIOS image swap when changing it to the ON position.

SW6 switch block

Table 2. SW6 switch block

Switch block	Switch number	Switch name	Default position	Description
	SW6-1	ME security override	OFF	Disables ME Security checks when changing it to the ON position.
	SW6-2	Clear CMOS	OFF	Clears the real-time clock (RTC) registry when changing it to the ON position.
	SW6-3	Password override	OFF	Overrides the power-on password when changing it to the ON position.
	SW6-4	ME recovery	OFF	Boots ME into recovery mode when changing it to the ON position.
	SW6-5	BIOS recovery	OFF	Boots BIOS into recovery mode when changing it to the ON position.
	SW6-6	MFG mode	OFF	Enables MFG mode of firmware (UEFI/XCC/FPGA) when changing it to the ON position.
	SW6-7	At-Scale debug	OFF	Enables BMC At-Scale debug when changing it to the ON position.
	SW6-8	Low security	OFF	Keeping it ON allows transitioning between signed official XCC builds and XCC test signed builds, and bypasses CRTM boot check of XCC firmware.