System-Board Leds - Lenovo ThinkSystem SR850 Maintenance Manual

Table 10. System-board SW13 switch block descriptions (continued)
2
Off
3
Off
4 Off
5
Off
6
Off
7 Off
8 Off
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 http://thinksystem.lenovofiles.com/help/
topic/safety_documentation/pdf_files.html, "Installation Guidelines" on page 51, "Handling static-
sensitive devices" on page 53, and "Power off the server" on page 8.
2. Any system-board switch or jumper block that is not shown in the illustrations in this document are
reserved.
The following table describes the functions of the button on the system board.
Table 11. Button on the server
Button name
Force NMI button

System-board LEDs

Use this information to locate the system-board LEDs.
The following illustration shows the light-emitting diodes (LEDs) on the system board.
Disable PASSWORD_OVERRIDE
function
Serial port message from Lenovo
XClarity Controller
Reserved for trained service technician
Reserved for trained service technician
Reserved for trained service technician
Reserved for trained service technician
Normal
Function
This button is on the rear of the server. Press this button
to force a nonmaskable interrupt to the 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).
Enable PASSWORD_
OVERRIDE function
Serial port message from
uEFI
Force RTC reset
.
Chapter 2 Server components
23