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
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:
- 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
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
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. |