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System board jumpers

The following illustration shows the jumpers on the system board of your server.

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 jumpers
System board jumpers
Table 1. Jumper description
Jumper/Switch nameJumper/Switch numberJumper/Switch setting

1 TPM/TCM physical presence jumper

JP6

  • Pins 1 and 2: The jumper is in default setting.
  • Pins 2 and 3: TPM/TCM physical presence is asserted.

2 Clear CMOS jumper

JP3

  • Pins 1 and 2: The jumper is in default setting.
  • Pins 2 and 3: Clear the real-time clock (RTC) registry.

3 ME firmware security override

JP8

  • Pins 1 and 2: The jumper is in default setting.
  • Pins 2 and 3: Enable Flash security override.
Note
For debug only.

4 SW6 switch block

SW6 (including switches 1, 2, 3, 4, 5, 6, 7, and 8)

All the switches are in the Off position by default.

  • Switches 1, 6, and 8: Reserved.

  • Switch 2: Override power-on password switch.

    Changing position of this switch overrides the power-on password.

    Changing position of this switch does not affect the administrator password.

4 Power permission

SW6 (switch 7)

The default position is Off. Changing this switch to the On position enables Power On.

4 Force XCC reset

SW6 (switch 4)

The default position is Off. Changing this switch to the On position resets the Lenovo XClarity Controller.

4 Boot backup UEFI

SW6 (switch 5)

The default position is Off. Changing this switch to the On position forces the tower server to boot from the backup UEFI image.

4 Force XCC update

SW6 (switch 3)

The default position is Off. Changing this switch to the On position force the Lenovo XClarity Controller to update to the latest version.

Important
  • Before you move any jumpers, power off the server; then, disconnect all power cords and external cables. Do not open your server or attempt any repair before reading and understanding the following information:
  • Any system-board switch or jumper block that is not shown in the illustrations in this document are reserved.