Lenovo HX1310 Installation And Service Manual page 38

UEFI boot backup
jumper (J13)
Clear CMOS jumper (J11)
Figure 16. System-board switches, jumpers, and buttons
The following table describes the jumpers on the system board.
Table 1. System board jumpers
Jumper number
J11
J13
Notes:
• If no jumper is present, the server responds as if the pins are set to the default.
• Changing the position of the UEFI boot backup jumper (J13) 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.
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HX1310, HX2310-E, HX3310, HX3310-F Installation and Service Guide
1
2
3
3
2
1
System TPM physical
presence switch (SW11)
Jumper name
Clear CMOS jumper
UEFI boot backup jumper
NMI button
On Off
2
1
Jumper setting
• Pins 1 and 2: Normal (default).
• Pins 2 and 3: Clears the real-time clock (RTC)
registry.
• 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.
SW3 switch
block
Off
On
8 7 6 5 4 3 2 1