System-Board Switches And Jumpers - IBM System x3100 M4 Type 2582 Problem Determination And Service Manual

Before you disconnect the power source, make a note of which LEDs are lit,
including the LEDs that are lit on the operation information panel and LEDs inside
the server on the system board.
Table 3. System board LEDs
Component LED
DIMM error LEDs
Microprocessor/CPU error LED
System board error LED
IMM heartbeat LED
RTMM heartbeat LED
Standby power LED

System-board switches and jumpers

The following illustration shows the jumpers on the system board.
BIOS boot backup
jumper (JP2)
Description
A memory DIMM has failed or is incorrectly installed.
Microprocessor has failed, is missing, or has been incorrectly installed.
Note: (Trained service technician only) Make sure that the
microprocessor is installed in the correct sequence; see "Installing a
microprocessor and heat sink" on page 254.
System-board CPU VRD and/or power voltage regulators have failed.
Indicates the status of the boot process of the IMM2.
When the server is connected to power this LED flashes quickly to
indicate that the IMM2 code is loading. When the loading is complete,
the LED stops flashing briefly and then flashes slowly to indicate that
the IMM2 if fully operational and you can press the power-control
button to start the server.
Power-on and power-off sequencing.
When this LED is lit, it indicates that the server is connected to ac
power.
Clean CMOS
jumper (JP1)
TPM initialization
jumper (JP11)
ME flash
override
jumper(JP9)
Low security_N IMM SPI half
jumper (JP22) ROM enable (JP12)
ME recovery
jumper (JP8)
Microprocessor
DIMM 1 slot
DIMM 2 slot
DIMM 4 slot DIMM 3 slot
Chapter 2. Introduction
19