Sun Microsystems SPARC classic X, Service Manual

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2-8 SPARCclassic/SPARCclassic X/SPARCstation LX Service Manual • November 1993
2.5 Power-On Self-Test
For more information about the POST, see Chapter 3 “Power-On Self-Test (POST).”
2.6 Selected On-Board Tests
For information about how to run the On-Board Diagnostics, see Appendix C “On-
Board Diagnostics.”
TABLE 2-4
lists specific on-board diagnostic tests for
SPARCclassic and SPARCstation LX systems.
TABLE 2-4
On-Board Diagnostics
Test Description and Requirements
test floppy Tests the floppy drive’s ability to respond to commands. Requires a formatted diskette in
the drive.
test screen Tests the system video graphics hardware and monitor. The
diag-switch?
NVRAM
parameter must be set to True for the test to run.
test scsi Tests the SCSI logic on the main logic board. The
diag-switch?
NVRAM parameter
must be set to True for the test to run.
test net-aui Performs internal and external loopback tests on the AUI (thick) Ethernet interface. A
cable must be connected to the system AUI Ethernet port and to an Ethernet tap, or the
test will fail the external loopback phase.
test net-tpe Performs internal and external loopback tests on the twisted-pair Ethernet (TPE)
interface. A cable must be connected to the system TPE port and to a TPE hub, or the test
will fail the external loopback phase. If the
tpe-link-test?
parameter is
False
(disabled), the external loopback test will appear to pass even if a cable is not connected.
test net Performs internal and external loopback tests on the auto-selected system Ethernet
interface. A cable must be attached to the system and to an Ethernet tap or hub, or the
external loopback test will fail.
test disk
test disk0
test disk1
test disk2
test disk Tests internal or external SCSI disks that have a self-diagnostic program contained in the
drive controller. The drive must be spinning before this test is executed or the test will
fail. Enter a
boot
<disk alias> command to cause the drive to spin up. (
disk0
= SCSI
target 0,
disk1
= SCSI target 1,
disk2
= SCSI target 2,
disk and disk3
= SCSI target
3.)
test cdrom Performs a diagnostic self-test on the CD-ROM drive. The CD-ROM must be set to SCSI
target 6 and have a CD inserted or the test will fail.