Troubleshooting The System Using The Power-On Self Test (Post) - Sun Microsystems Netra CT Service Manual

For more information on these and other tests in the SunVTS test suite, refer to the
Computer Systems Release Notes Supplement for Sun Hardware document or the
SunVTS documentation on the Solaris on Sun Hardware Answerbook, both included
with your Solaris operating environment.
4.4 Troubleshooting the System Using the
Power-On Self Test (POST)
When you first power-up the Netra CT server, some or all of the green Power LEDs
on the system status panel will flash on and off for several seconds. The green Power
LED for the I/O slot holding the CPU card (slot 1 in the Netra CT 810 server and slot
3 in the Netra CT 410 server) will go to solid green while the green Power LEDs for
the remaining components are still flashing on and off; this is an indication that the
CPU card has passed the power-on self test (POST).
Before any processing can occur on a system, it must successfully complete the
POST. Messages are displayed for each step in the POST process. If there is a critical
failure, the system will not complete POST and will not boot. To monitor this
process, you must be connected to the TTY A port on the CPU card or CPU
transition card. See
OpenBoot PROM (OBP) variables control the console port. The variables and their
possible settings are described below.
To see the console output device, enter:
ok printenv output-device
The screen will display something similar to the following:
output-device
The possible settings for this variable are:
ttya (default)
I
I ttyb
screen
I
I rsc
Section 5.2.1, "Logging In to the Netra CT Server" on page
ttya
Chapter 4 Troubleshooting the System
5-4.
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