Sun Microsystems 280R manual System LED Indicators

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

General fault

This green LED lights continuously when the system power is on.

This amber LED lights steadily when a system hardware fault is detected. For example, the LED lights when: a fault occurs in a power supply indicating an over-temperature condition, an incorrect voltage occurs in a power supply, an electrical short occurs in a power supply, or when a fan failure occurs in a power supply.

During the boot process, this LED flashes for approximately three seconds. If the user presses the Power button twice within the three seconds, the system will come up with factory-set Safe mode NVRAM variable settings, returning the system to the ok firmware prompt. See “How to Use Default NVRAM Parameters” on page 178 for more information.

This amber LED lights steadily if either installed power supply is not a 560-watt power supply.

This amber LED lights steadily if there is a single system fan failure, or lit by software.

See “About Using Diagnostic Tools to Monitor, Diagnose, and Exercise the System” on page 162 for information about troubleshooting your server.

10 Sun Fire 280R Server Owner’s Guide • January 2001