10 Sun Fire 280R Server Owner’s Guide • January 2001
System LED Indicators
The two system LEDs consist of a system power indicator and a fault indicator.The
system power indicator lights continuously green to show that the system is
powered on. The fault indicator lights when a problem is detected in the system.
Because it is important to know that a fault exists in the system after an error
condition occurs, the fault indicator remains lit when the system is in normal
operating mode. When the system is switched Off using the keyswitch, the LED
indicator stays lit for devices drawing standby power.
When you first power on the system, both the system indicator LEDs are lit. The
general fault indicator lights steadily for two seconds and is then toggled off. After
that, the LEDs operate as described in the following table.
Name Icon Description
Power-
on/Activity This greenLED lights continuously when the system
power is on.
General fault This amber LED lights steadily when a system
hardwarefault is detected. For example, the LED lights
when: a fault occurs in a power supply indicating an
over-temperaturecondition, an incorrect voltage occurs
ina power supply, an electricalshort occurs in a power
supply,or when a fan failure occurs in a power supply.
During the boot process,this LED flashes for
approximatelythree seconds. If the user presses the
Power button twice within the threeseconds, the
system will come up with factory-set Safe mode
NVRAM variable settings, returningthe system to the
okfirmware prompt. See “How to Use Default NVRAM
Parameters” on page178 for more information.
Thisamber LED lights steadily if either installed power
supply is not a 560-watt power supply.
This amber LED lights steadily if thereis a single
system fan failure,or lit by software.
See “About Using Diagnostic Toolsto Monitor,
Diagnose, and Exercisethe System” on page 162 for
information about troubleshootingyour server.