IBM System x3650 M4 BD Type 5466 Installation And Service Manual page 139

Figure 73. System board LEDs
LED name
Error LEDs
RTMM heartbeat LED
IMM 2 heartbeat LED
Standby power LED
System board error LED System-board has failed.
Microprocessor
mismatch LED
DIMM error LEDs
Microprocessor error
LED
Light path LED
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.
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.
Microprocessor has failed, is missing, or has been incorrectly
installed.
Indicates whether or not the lightpath button is functional. If the
light path LED is lit after pressing the lightpath button, it
indicates that the lightpath button is functioning properly. By
contrast, if the lightpath LED is not lit when pressing the light
path button, it means the lightpath button is not functioning
properly.
Chapter 4. Troubleshooting
123