The following table describes the jumpers on the system board.
Table 5. System board jumpers
Jumper
number
Jumper
name Jumper setting
J29 UEFI boot
recovery
jumper
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.
J147 IMM
recovery
jumper
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.
SW3 switch blockSW4 switch block
UEFI boot recovery
jumper (J29)
1
2
3
1
2
3
IMM recovery jumper
(J147)
Figure 15. System-board switches and jumpers
30 System x3650 M3 Types 4255, 7945, and 7949: Installation and User’s Guide