Lenovo System x3650 M5 Installation And Service Manual page 49

Table 2. System board jumpers (continued)
Jumper number
J15
Notes:
1. If no jumper is present, the server responds as if the pins are set to the default.
2. Changing the position of the UEFI boot backup jumper (J15) from pins 1 and 2 to pins 2 and 3 before the server is
turned on alters which flash ROM page is loaded. Do not change the jumper pin position after the server is turned
on. This can cause an unpredictable problem.
The following table describes the functions of the SW6 switch block on the system board.
Table 3. System board SW6 switch block definition
Default position
Switch number
1 Off
2 Off
3
Off
4 Off
5 Off
6
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 "Safety" on page v, "Installation guidelines"
on page 305, "Handling static-sensitive devices" on page 307, and "Turning off the server" on page 45.
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 4. Button on the server
Button name
Force NMI button
Jumper name
UEFI boot backup jumper
Description
Reserved.
Power-on password override. Changing the position of this switch
bypasses the power-on password check the next time the server is
turned on and starts the Setup Utility so that you can change or
delete the power-on password. You do not have to move the switch
back to the default position after the power-on password in
overridden.
Changing the position of this switch does not affect the
administrator password check if an administrator password is set.
Reserved.
Reserved.
Reserved.
Reserved.
Jumper setting
• Pins 1 and 2: Normal (default). Loads the
primary server firmware ROM page.
• Pins 2 and 3: Loads the secondary (backup)
server firmware ROM page.
Function
This button is on the rear of the server. Press this button
to force a nonmaskable interrupt to the microprocessor.
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).
.
Chapter 1 The System x3650 M5 server
37