Lenovo ThinkSystem SR670 V2 - Page 45

safety_documentation/pdf_files.html, “Installation Guidelines” on page 121, “Handling static-sensitive
devices” on page 123, and “Power off the server” on page 14.
2. Any system-board switch or jumper block that is not shown in the illustrations in this document are
reserved.
SW1 switch block
The following table describes the functions of the SW1 switch block on the system board.
Table 14. System board SW1 switch block description
Switch number
Default position Description
1
Off
Reserved
2
Off Changing this switch to the On position overrides the power-on
password.
Changing the position of this switch does not affect the
administrator password check if an administrator password is set.
3
Off Changing this switch to the On position to bypass the operational
firmware image and performs a BMC firmware update, if the normal
firmware update procedure results in an inoperative BMC.
Note: Use this switch only if the normal firmware update procedure
fails and the operational firmware image is corrupted. Use of this
switch disables normal baseboard management controller
operation.
4
Off
Reserved
SW2 switch block
The following table describes the functions of the SW2 switch block on the system board.
Table 15. System board SW2 switch block description
Switch number
Default position Description
1
Off Changing the switch to the On position to enable ME boots to
recovery.
2
Off
Reserved
3
Off Changing this switch to the On position to enable Power On.
4
Off Reserved
SW3 switch block
The following table describes the functions of the SW3 switch block on the system board.
Table 16. System board SW3 switch block description
Switch number
Default position Description
1
Off
Reserved
2
Off
Reserved
3
Off
Reserved
4
Off When the switch is in the default Off position, the server will boot by
using the primary XClarity Controller firmware. Change this switch to
the On position, to enable the server to boot by using a backup of
the XClarity Controller firmware.
Chapter 2. Server components 37