Sun Microsystems SunSwift SPARCserver 1000, Service Manual

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3-8 SPARCserver 1000 System Service Manual—June 1996
3
Figure 3-8 Branch B.3: SBus Card Fault
B.3
C
Type
test all
at the OK prompts. All
devices connected to the system and have
resident test procedures are tested. For
more information, refer to the
OpenBoot
Command Reference Guide.
Check the SunDiag manual for a list of
SBus tests. If there is a test, follow the
procedure for running SunDiag. (the
System must be able to complete the boot
process). Most SBus cards carry a self-test in the
fcode PROM. These tests can be run
manually.
If the self-test fails, swap the SBus card
and repeat the test.
Run SunDiag program with test enabled
for the SBus card in question. If it fails,
swap the SBus card and repeat the test.
If the board is not faulty, the problem may be
a serial cable, peripheral, modem, or patch
panel. Next, attempt to boot the system.
SBus cards are not tested in POST. You may be unable to troubleshoot
down to a specific SBus card failure, but all Sbus cards contain a PROM
and onboard diagnostics. There are two ways to do limited
troubleshooting for Sbus cards: SunDiag and Open Boot PROM.