System-board switches, jumpers, and buttons
The following illustration shows the location of the switches, jumpers, and buttons
on the server.
Note: If there is a clear protective sticker on the top of the switch block, you must
remove and discard it to access the switch.
The following table describes the jumpers on the system board.
Table 2. System-board jumpers
Jumper number Jumper name Jumper setting
J71 UEFI boot recovery jumper
v Pins 1 and 2: (default)
Loads the primary UEFI
firmware ROM page.
v Pins 2 and 3: Loads the
secondary (backup) UEFI
firmware ROM page.
28 System x3750 M4 Types 8722 and 8733: Installation and Service Guide
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