System-Board Switches And Jumpers - IBM xSeries 306m Problem Determination And Service Manual

System-board switches and jumpers

The following illustration shows the switches and jumpers on the system board.
The following illustration identifies the pins on a jumper and shows the location of
pin 1.
Pin 1 mark
3
2
1
Table 2. Switch and jumper settings
Component
CMOS jumper (JP3)
Boot block jumper (JP4)
NMI (non-maskable
interrupt) switch (SW1)
Mini-BMC jumper (JP6)
Settings
v Pins 1 and 2: Keep CMOS data (default)
v Pins 2 and 3: Clear the CMOS data, which clears the
power-on password and administrator password
v Pins 1 and 2: Normal (default)
v Pins 2 and 3: Recover boot block.
v Normal (default): No NMI issued
v NMI button on rear of server pressed: NMI issued
v Pins 2 and 3: Normal (default)
v Pins 1 and 2: Disable the mini-BMC. This setting might be
necessary when a service processor adapter other than
the optional Remote Supervisor Adapter II is installed.
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Chapter 1. Introduction