Lenovo ThinkSystem ST250 V2 Maintenance Manual page 39

Figure 13. System-board jumpers and buttons
The following table describes the jumpers and buttons on the system board.
Table 10. System-board jumpers and buttons
Jumper and button name
Power permission override jumper
1
Force Lenovo XClarity Controller update
2
jumper
Clear CMOS jumper
3
Force NMI button
4
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_documentation/pdf_files.html
devices" on page 88, and "Power off the server" on page 13.
Jumper setting / Button function
• Pins 1 and 2: Normal (default).
• Pins 2 and 3: Override the power-on permission.
• Pins 1 and 2: Normal (default).
• Pins 2 and 3: Force the Lenovo XClarity Controller to update to
the latest version.
• Pins 1 and 2: Normal (default).
• Pins 2 and 3: Clear the real-time clock (RTC) registry.
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).
, "Installation guidelines" on page 85, "Handling static-sensitive
http://thinksystem.lenovofiles.com/help/topic/
.
Chapter 2 Server components
29