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3.6
POST Error Messages
POST error messages returned to the terminal are self-explanatory. For example, if
no DSIMM is installed in the system, the POST will tell you that no DSIMM is
installed and will indicate the slot number of the DSIMM slot. Use the error
messages returned by POST to troubleshoot the system.
3.7
Status Lights (LEDs) and Indicators
The LED at the front of the chassis lights when the system is operating normally.
FIGURE 3-5
actions to take when the system LED is not lit.
System Front
FIGURE 3-5
Section 3.1 "Power-On Self-Test (POST)" on page 3-1, describes the keyboard LED
sequences displayed at power up when the POST fails. If a failure occurs during the
POST, the keyboard displays a specific LED pattern. See
FIGURE 3-3
interpreted as diagnostic error indicators.
Following the system initialization, the operating system boots automatically, unless
the NVRAM configuration options specify not to do so.
3-8
SPARCstation 4 Model 110 Service Manual • July 1996
shows the location of the system LED. Chapter 4, shows flow diagrams of
Location of System Power LED
and
. During normal system operation, the LEDs should not be
TABLE 3-1
System power LED
FIGURE 3-1
through
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Table of Contents
Troubleshooting
