3
2
1
1
2
3
Clear CMOS
jumper (CN14)
uEFI boot recovery
jumper (J2)
IMM2 TPM physical
presence jumper (J9)
System TPM physical
presence jumper (SW3)
Table 3. System board jumpers
Jumper number
Jumper name
Jumper setting
CN14
Clear CMOS jumper
• Pins 1 and 2: Normal (default) -
This keeps the CMOS data.
• Pins 2 and 3: This clears the
CMOS data such as power-on
password and loads the default
UEFI settings.
Note 2
J2
UEFI boot recovery jumper
• Pins 1 and 2: Normal (default)
Loads the primary firmware ROM
page.
• Pins 2 and 3: Loads the secondary
(backup) firmware ROM page.
Notes 1 and 2
Notes:
1. If no jumper is present, the server responds as if the pins are set to 1 and 2.
2. Changing the position of the UEFI recovery jumper from pins 1 and 2 to pins 2 and 3 before the server is turned
on sets the UEFI recovery process. Do not change the jumper pin position after the server is turned on. This can
cause an unpredictable problem.
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 36, “Handling static-sensitive devices” on page 38, and “Turning off the server” on page 26.
2. Any system-board switch or jumper blocks that are not shown in the illustrations in this document
are reserved.
32
Lenovo System x3630 M4 Installation and Service Guide
Summary of Contents for System x3630 M4
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