Sun Microsystems Ultra 5, Service Manual

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Chapter 4 Troubleshooting Procedures 4-11
Note – The diskette drive (floppy) is selected as the test alias name example.
CODE EXAMPLE 4-5
Test Diagnostic Output Message
ok test floppy
Testing floppy disk system. A formatted disk should be in the
drive.
Test succeeded.
ok
TABLE 4-4
Selected OBP On-Board Diagnostic Tests
Type of Test Description Preparation
test screen
Tests the system video graphics hardware
and the monitor.
Diag-switch?
NVRAM parameter must
be true for the test to execute.
test floppy
Tests the diskette drive response to
commands. A formatted diskette must be inserted into
the diskette drive.
test net
Performs an internal/external loopback test
of the system auto-selected Ethernet
interface. An Ethernet cable must be attached to the
system and to an Ethernet tap or hub.
test ttya
test ttyb
Outputs an alphanumeric test pattern on
the system serial ports: ttya, serial port A;
ttyb, serial port B A terminal must be connected to the port
being tested to observe the output.
test
keyboard
Executes the keyboard selftest. Four keyboard LEDs should flash once and
a message should be displayed:
Keyboard Present
.
test -all
Sequentially tests system-configured
devices containing selftest. Tests are sequentially executed in device-
tree order (viewed with the
show-devs
command).