IBM x3630 M3 7377, Problem Determination And Service Manual, Page: 36 / 294

System-board jumpers
This section describes the jumpers on the system board.
Table 3. System board jumpers
Jumper number Jumper name Jumper setting
JP2 Clear CMOS jumper
v
Pins 1 and 2: Normal
(default) - This keeps the
CMOS data.
v
Pins 2 and 3: This clears
the CMOS data such as
power-on password and
loads the default UEFI
settings.
JP3 UEFI boot recovery jumper
v
Pins 1 and 2: Normal
(default) Loads the primary
firmware ROM page.
v
Pins 2 and 3: Loads the
secondary (backup)
firmware ROM page.
Notes:
v
If no jumper is present, the server responds as if the pins are set to 1 and 2.
v
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.
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IBM System x3630 M3 Type 7377: Problem Determination and Service Guide