Sun Microsystems SPARCcenter 2000 Service Manual page 71

SBus cards are not tested in POST. You may not be able to troubleshoot down to a specific SBus card
B.3
failure, but all Sbus cards contain a PROM and onboard diagnostics. There are two ways to do limited
troubleshooting for Sbus cards: SunDiag and OpenBoot PROM.
Check the SunDiag manual for a list of SBus
tests. If there is a test, follow the procedure
for running SunDiag. (System must be able to
complete the boot process).
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.
C
Figure 3-7 Branch B.3: SBus Card Faults
Troubleshooting Flow Diagrams
Most SBus cards carry a self-test in the fcode
PROM. These tests can be run manually.
Type test all at the OK prompt. All
devices that are connected to the system
and have resident test procedures will be
tested. For more information, refer to the
OpenBoot Command Reference Guide.
If the self-test fails, swap the SBus card and
repeat the test.
3
3-7