Power On Self Test (Post) - Sun Microsystems Sun Fire V1280 Service Manual

1.3

Power On Self Test (POST)

This section contains procedures to initiate the Sun Fire V1280 system unit power-on
self-test diagnostics. Procedures are also included to support pre-POST preparation,
POST data interpretation and the bypassing of POST diagnostics.
The Sun Fire V1280 system is designed with an intelligent System Controller (SC)
which is used for configuring, monitoring, recovering (from errors) and controlling
the system. The primary responsibility for the execution and control of the various
Power On Self Tests (POSTs) lies with code executed by the System Controller.
Power-on self testing consists of SCPOST (executed immediately after a power cycle
or a reset of the SC and before the LOM prompt command line interface is
displayed) and SPOST/LPOST (which run when the system is powered on from
Standby mode). shows the sequence of POST tests during system power-
FIGURE 1-1
on.
Chapter 1 Fault Isolation 1-5