System-board switches

The following illustration shows the location and description of the switches.

Important

If there is a clear protective sticker on the switch blocks, you must remove and discard it to access the switches.
Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.

Figure 1. Location of the switches, jumpers, and buttons on the system board

The following table describes the jumpers on the system board.

Table 1. Jumper definition.
The jumper description table with one level of row and column headers.
Jumper name	Description
`1` Low security	Pins 1 and 2: Disable low security (default). Pins 2 and 3: Enable low security.
`2` Clear CMOS	Pins 1 and 2: Keep CMOS data (default). Pins 2 and 3: Clear CMOS data.
`3` Serial select	Pins 1 and 2: Send the serial input output (SIO) to the front serial port (default) . Pins 2 and 3: Sends the XCC to the serial port.

Table 2. Switch definition.
The switch description table with one level of row and column headers.
Switch name	Switch number	Switch name	Usage description
`4` PCH switch block - PCHSW1	1	Machine Engine (ME) firmware security override	ME update by jumper.	Normal (default)
	2	ME firmware update	Force update mode.	Normal (default)
	3	Password override	Overrides the power-on password.	Normal (default)
	4	Trusted Platform Module (TPM) physical presence	Indicates a physical presence to the system TPM.	Normal (default)

Important

Before you change any switch settings or move any jumpers, turn off the solution; then, disconnect all power cords and external cables. Review the information in Safety Information page, Installation Guidelines, Handling static-sensitive devices, and Power off nodes.
Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.

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