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System-Board Switches And Jumpers - IBM 7945G2U Installation And User Manual

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System-board switches and jumpers

The following illustration shows the location and description of the switches and
jumpers.
Note: If there is a clear protective sticker on the top of the switch blocks, you must
remove and discard it to access the switches.
The default positions for the UEFI and the IMM recovery jumpers are pins 1 and 2.
The following table describes the jumpers on the system board.
30
System x3650 M3 Types 4255, 7945, and 7949: Installation and User's Guide
UEFI boot recovery
jumper (J29)
SW4 switch block
Table 3. System board jumpers
Jumper
Jumper
number
name
J29
UEFI boot
recovery
jumper
IMM recovery jumper
(J147)
1
2
3
3
2
1
SW3 switch block
Jumper setting
v Pins 1 and 2: Normal (default) Loads the primary server
firmware ROM page.
v Pins 2 and 3: Loads the secondary (backup) server firmware
ROM page.

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