System board switches

The following illustrations show the location of the switches on the server.

Locations of system board switches

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

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.

Table 1. **System board switches**
`1` SW7 switch block	`3` SW9 switch block
`2` SW6 switch block

The following table describes the functions of the SW6 switch block on the system board.

Table 2. **System board SW6 switch block description**
Switch number	Default position	Description	Definition
1	Off	ME security override	Changing this switch to the On position disables ME Security checks.
2	Off	Real time clock (RTC) reset	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.
3	Off	Password clear	Changing this switch to the On position overrides the power-on password.
4	Off	ME recovery	Changing this switch to the On position boots ME to recovery
5	Off	Reserved	This switch is reserved for development purpose only. Keep this switch in the Off position.
6	Off	Reserved	This switch is reserved for development purpose only. Keep this switch in the Off position.
7	Off	Reserved	This switch is reserved for development purpose only. Keep this switch in the Off position.
8	Off	Reserved	This switch is reserved for development purpose only. Keep this switch in the Off position.

The following table describes the functions of the SW7 switch block on the system board.

Table 3. **System board SW7 switch block description**
Switch number	Default position	Description	Definition
1	Off	BMC boot primary	Off: XCC boots from upper half of flash region. On: XCC boots from lower half of flash region.
2	Off	XCC force update	Changing this switch to the On position forces XCC to boot from kernel code only.
3	Off	Power permission override	Changing this switch to the On position ignores Power Permission and allows the system to power-on.
4	Off	Force XCC reset	Changing this switch to the On position forces XCC reset.
5	Off	Serial select	Changing this switch to the On position accesses the BMC via the serial port.

The following table describes the functions of the SW9 switch block on the system board.

Table 4. **System board SW9 switch block description**
Switch number	Default position	Description	Definition
1	Off	Force FPGA reset	Changing this switch to the On position forces FPGA to reset.
2	Off	Force BMC CPU reset	Changing this switch to the On position forces the BMC and CPU to reset.
3	Off	Reserved	This switch is reserved for development purpose only. Keep this switch in the Off position.
4	Off	Reserved	This switch is reserved for development purpose only. Keep this switch in the Off position.

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