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Switch blocks

Switch blocks are located on the system board.

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.

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

SW1 (PCH/ME switch block)​

The PCH/ME switch block is located near the M2 SATA/PCIe backbplane connector on the system board. See System board components for the exact location of the switch block.
Graphic depicting switch block layout

Table 1 describes the functions of the switch block.

Table 1. PCH/ME switch block definition
Switch position numberDefault positionFunctionDescription

1

Off

Clear CMOS

Toggle to ON to clear the real time clock (RTC) registry.

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 information in Safety Information page, Installation Guidelines, Handling static-sensitive devices, and Power off the server.

SW6 (system switch block 1)​

System switch block 1 is located near the operator panel connector on the system board. See System board components for the exact location of the switch block.
Graphic depicting switch block layout

Table 2 describes the functions of the switch block.

Table 2. System switch block 1 definition
Switch position numberDefault positionFunctionDescription

2

Off

Force XCC update

Toggle to ON to force the Lenovo Xclarity Controller to update to the latest version.

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 information in Safety Information page, Installation Guidelines, Handling static-sensitive devices, and Power off the server.

SW7 (system switch block 2)​

System switch block 2 is located near power connector 1 on the system board. See System board components for the exact location of the switch block.
Graphic depicting switch block layout

Table 3 describes the functions of the switch block.

Table 3. System switch block 2 definition.
Switch position numberDefault positionFunctionDescription

2

Off

Override power-on password

Toggle to ON to override the power-on password.

4

Off

Force XCC reset

Toggle to ON to reset the Lenovo XClarity Controller.

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 information in Safety Information page, Installation Guidelines, Handling static-sensitive devices, and Power off the server.

SW11 (FPGA switch block)​

The FPGA switch block is located next to system switch block 2 on the system board. See System board components for the exact location of the switch block.
Graphic depicting switch block layout

Table 4 describes the functions of the switch block.

Table 4. FPGA switch block definition.
Switch position numberDefault positionFunctionDescription

1

Off

TPM physical presence

Toggle to ON to assert physical presence.

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 information in Safety Information page, Installation Guidelines, Handling static-sensitive devices, and Power off the server.