Lenovo ThinkSystem SR860 V2 Maintenance Manual page 47

Figure 19. Switches, jumpers and buttons
"NMI button" on page 39
1
"Light path button" on page 39
2
NMI button
Table 14. NMI button
Button name Function
Force NMI This button is on the rear of the server. Press this button to force a nonmaskable interrupt to the
button processor. You might have to use a pen or the end of a straightened paper clip to press the button.
You can also use it to force a blue screen memory dump (use this button only when you are directed
to do so by Lenovo Support).
Light path button
Table 15. Light path button
Button name Function
Light path Press this button to light the LEDs on the system board when the power source has been removed
button from the server.
SW4
See the following table for SW4 switch block functions.
Table 16. System board SW4 switch block descriptions
Switch
Default position
number
1, 16
Off
2, 15 Off
3, 14 Off
4, 13
Off
5, 12 Off
Off
Host TPM Physical Presence disabled
PASSWORD_OVERRIDE function disabled
Serial port message from uEFI
XCC TPM Physical Presence disabled
Managing Engine recovery mode disabled
"SW4" on page 39
3
On
Host TPM Physical Presence enable
PASSWORD_OVERRIDE function
enabled
Serial port message from Lenovo
XClarity Controller
XCC TPM Physical Presence
enabled
Managing Engine set to recovery
mode
Chapter 2
.
Server components
39