Skip to main content

System-board switches

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

Important
  1. If there is a clear protective sticker on the switch blocks, you must remove and discard it to access the switches.
  2. 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
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 nameDescription
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 nameSwitch numberSwitch nameUsage description
4 PCH switch block - PCHSW11Machine Engine (ME) firmware security overrideME update by jumper.Normal (default)
2ME firmware updateForce update mode.Normal (default)
3Password overrideOverrides the power-on password.Normal (default)
4Trusted Platform Module (TPM) physical presenceIndicates a physical presence to the system TPM.Normal (default)
Important
  1. 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.
  2. Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.