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2. Any system-board switch or jumper blocks that are not shown in the illustrations
System-board LEDs
The following illustration shows the light-emitting diodes (LEDs) on the system
board.
Note: Error LEDs remain lit only while the server is connected to power. If you
disconnect power to the server, you can press and hold the light path diagnostics
button to light the error LEDs on the system board.
"Safety" on page vii, "Installation guidelines" on page 35, "Handling
static-sensitive devices" on page 37, and "Turning off the server" on page 24.)
in this document are reserved.
LED name
Error LEDs
RTMM heartbeat LED
IMM 2 heartbeat LED
Standby power LED
System board error LED
Microprocessor
mismatch LED
DIMM error LEDs
Description
When an error LED is lit, it indicates that the associated
component has failed.
Power-on and power-off sequencing.
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.
When this LED is flashing, it indicates that the server is
connected to an ac power source.
When this LED is lit, it indicates that the server is dc power on.
System-board has failed.
When this LED is lit, it indicates that microprocessor 1 is not
installed, or the microprocessors do not have the same cache
size and type, and clock speed.
A memory DIMM has failed or is incorrectly installed.
Chapter 2. Installing optional devices
31
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