Sun Microsystems SPARCcenter 2000 Service Manual page 46

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2.1.2 Console Messages
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Caution – The system master is a standard system board. However, the
following is recommended: Do NOT swap the system master with another
board for purpose of troubleshooting. The system master is configured to fulfill
minimum requirements, and if swapped with another board of lesser
configuration, results may be misleading.
A system console (or tip line) is an alternative means for troubleshooting. The
system console is connected to serial port "A" on the system board in slot 0
only; messages will not display if the console is connected any other system
board. Refer to Section 2.1.1, "LEDs," to determine the system master.
To install and setup a terminal, see Section 2.5, "Connecting a Terminal to the
System Master."
The prtdiag command displays information which is useful for most field
repairs. See Section 2.2, "Using prtdiag."
The probe scsi command displays the status of SCSI-2 devices installed in
your system. See Section 2.3, "Using probe scsi."
As system boot initializes, POST tests the general functionality of system
boards and some supporting system hardware. POST presents several menus
to help the user debug failures. For a complete explanation of menus, see the
SPARCcenter 2000 POST User's Guide. The menus provide detailed information
that may prove more useful in the factory or service depot than in the field.
When POST ends, OBP continues the boot process by establishing
communication among separate functional hardware elements in the system
configuration. OBP displays messages on a terminal connected to the OBP
system board. For information on OBP messages and commands, see the
OpenBoot Command Reference.
Caution – Pauses may occur during boot which can be easily misinterpreted as
a locked-up system. If the terminal remains blank during POST, or appears to
lock up during OBP, see Section 2.4, "Precautions when Using POST and OBP."
SPARCcenter 2000/2000E Service Manual—June 1996