IBM 865951Y - Netfinity 5000 - 51Y, Hardware Maintenance Manual

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.1/
Power-On Light: This green LED blinks
when the server is in Standby mode
(power is present but the server is not
turned on). The blinking changes to a
solid (continuous) light when you turn on
the server remotely (Unattended mode) or
by pressing the Power-On Switch. If this
light is not on, the power cord is not
connected or the power supply has failed.
.2/
POST Complete Light: This green LED
lights when the server completes the
power-on self-test (POST) without any
errors.
.3/
SCSI Hard Disk Drive In-Use Light: This
green LED lights when the server is
accessing a SCSI device. If this light
remains illuminated, it might indicate that
either the SCSI bus or the system
microprocessor has stopped.
.4/
Primary Microprocessor Activity Light:
This green LED blinks to indicate the
activity of a microprocessor installed in the
primary microprocessor socket. The LED
comes on during POST to indicate the
presence of the microprocessor.
.5/
Secondary Microprocessor Activity
Light: This green LED blinks to show the
activity of a microprocessor installed in the
secondary microprocessor socket. The
LED lights during POST to indicate the
presence of the microprocessor. When you
install a secondary microprocessor, it
becomes the startup microprocessor.
.6/
System Error Light: This amber LED
shows that a system error occurred.
System errors can include high
temperature, excess current, or failure or
errors in the microprocessor, system fan,
memory, PCI bus, SCSI bus, USB, hard
disk drive, diskette drive, serial port,
keyboard interface, or power supply.
When this LED is on, one or more LEDs
on the system board also might be on,
indicating where the error occurred (see
“System board LEDs” on page 142).
.7/
Reserved: This LED is reserved for future
use.
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Netfinity Server HMM