Openboot Diagnostics (Ob Diag) - Sun Microsystems Netra CT Service Manual

TABLE 4-7
Type of Test
test ttya
test ttyb
test keyboard
test -all
4.7.8

OpenBoot Diagnostics (OB Diag)

OpenBoot Diagnostics is an interactive tool that tests various hardware and
peripheral devices. When obdiag is typed at the ok prompt in OBP, the menu shown
in
CODE EXAMPLE 4-6
OBDiag performs root-cause failure analysis on the referenced devices by testing
internal registers, confirming subsystem integrity, and verifying device functionality.
To run OBDiag:
1. At the ok prompt, enter obdiag.
This displays the OBDiag menu as shown in
Selected OBP On-Board Diagnostic Tests (Continued)
Description
Outputs an alphanumeric test
pattern on the system serial
ports: ttya, serial port A; ttyb,
serial port B.
Executes the keyboard self-test.
Sequentially test system-
configured devices containing
self-test.
is displayed on the screen.
Preparation
A terminal must be connected to the
port being tested to observe the
output.
Four keyboard LEDs should flash
once and a message is displayed:
Keyboard Present.
Tests are sequentially executed in
device-tree order (viewed with the
show-devs command).
.
CODE EXAMPLE 4-6
Chapter 4 Troubleshooting the System 4-27