System-Board Switches And Jumpers - IBM System x3550 M3 Type 4254 Problem Determination And Service Manual

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.
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IBM System x3550 M3 Types 4254 and 7944: Problem Determination and Service Guide
Table 2. System board jumpers
Jumper number
J29
J147
Jumper name
UEFI boot recovery jumper
IMM recovery jumper
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.
v Pins 1 and 2: Normal
(default) Loads the primary
IMM firmware ROM page.
v Pins 2 and 3: Loads the
secondary (backup) IMM
firmware ROM page.