Table of Contents
Advertisement
If the system passes all the POSTs, all four LEDs light again and then go off. Next,
the OBP firmware performs its initialization sequence and the system banner
appears on the screen. A generic SPARCstation banner is shown as an example.
From this point on, the keyboard LEDs assume their normal functions (that is, you
should no longer interpret the LEDs as diagnostic error indicators).
FIGURE 3-4
Following the system's successful initialization, the operating system is booted
automatically—unless the NVRAM configuration options specify otherwise.
You can retrieve more detailed POST failure information by connecting a terminal to
the ttya serial port. If you connect a terminal, you must set the NVRAM parameter
diag-switch? to true. For more information about the NVRAM parameters, see
TABLE 2-1
console, whether or not the system is in Diagnostic Mode. However, it may be easier
to understand the failure message output when it is accompanied by more detailed
POST progress messages available via the ttya serial port.
3.2
Normal Mode
Under Normal Mode, when the system is turned on, control is sent to the OpenBoot
PROM. Depending on the options set in the OpenBoot PROM, for example if auto-
boot? is enabled (set to true), the operating system will load. Diagnostic testing is
not run.
3.3
Full Diagnostic Mode
Full Diagnostic Mode tests the major hardware system board components and, if the
POST is successful, control is transferred to the OBP firmware that probes the
installed SBus modules. Full Diagnostic Mode runs if one of these conditions is met:
You press and hold the Stop-d keys while you turn on the power.
3-4
SPARCstation 4 Model 110 Service Manual • July 1996
SPARCstation XXX, Keyboard Present
ROM Rev. X.XY, XX MB memory installed, Serial #XXX
Ethernet address X:X:YY:Z:A:BB, Host ID: XXXXXXXX.
SPARCstation System Banner
on page 2-5. Test failure messages are displayed on the system monitor or
Advertisement
Table of Contents
Troubleshooting
