Status Lights (Leds) And Indicators - Sun Microsystems SPARCclassic Service Manual

Status Lights (LEDs) and Indicators

The LED at the front of the chassis lights up when the system is operating normally.
Figure 3–3 shows the location of the system LED. Chapter 4," shows flow diagrams
of actions to take when the system LED is not lit.
Figure 3–3 System Power LED on Front of System
This section describes the keyboard LED sequences displayed at power up when
POST fails. If a failure occurs in POST, the keyboard displays a specific LED pattern.
See Figure 3–4 and Table 3–1. During normal system operation, the LEDs should not
be interpreted as diagnostic error indicators.
Following the system initialization, the operating system boots automatically, unless
the NVRAM configuration options specify not to do so.
Note - The Caps Lock key LED, located just above the left-hand Shift key, is not used
as a power-on test failure indicator, but flashes on and off while POST is running.
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Power-On Self-Test (POST)