Sun Microsystems Ultra 1 140, Service Manual

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4-12 Sun Ultra 1 Series Service Manual—November 1995
4
Example:
4.6 Selected On-Board Diagnostic Tests
The on-board diagnostic tests that you can run on the Sun Ultra 1 Series
systems are listed in Table 4-5.
ok test floppy
Testing floppy disk system. A formatted disk should be in the
drive.
Test succeeded.
Table 4-5 Selected On-Board Diagnostics Tests
Type of Test Description Preparation
test screen
Tests the system's video graphics
hardware and monitor
The
diag-switch?
NVRAM parameter
must be set to true for the test to run.
test floppy
Tests the floppy drive's ability to
respond to commands Requires a formatted diskette to be
inserted into the drive.
test net-aui
Performs an internal and external
loopback test on the AUI (Thick)
Ethernet interface Connect a cable to the system's AUI
Ethernet port and to an Ethernet tap
or the test will fail the external
loopback phase.
test net-tpe
Performs an internal and external
loopback test on the TPE (Twisted-
Pair Ethernet) interface Connect a cable to the system's 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 an internal and external
loopback test 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.