Power-On Self Test Procedures - Sun Microsystems Sun-3/260 Hardware Installation Manual

24
Sun-3/260 Hardware Installation Manual
other end. Plug the female end into the
AC
input on the bottom rear of the pede-
stal.
Again make certain that the AC power switch on the pedestal is OFF (side of the
switch with the "0" is pushed in), then plug the other end of the AC power cord
into the AC wall receptacle.
Next, tum the power switch on the front of the Sun-3/260 pedestal
ON
(side with
the "1" is pushed in). You should see (or hear) several things happen:
CJ
the fans inside the pedestal will come on, and
CJ
the monitor screen will light up, also
CJ
the eight diagnostic LEDs on the CPU board will begin blinking on and off;
and, the two green LEDs on the back of the memory board/s should light up.
The upper green LED will continue to flicker as long as the CPU continues to
access the memory board/so (see below, "Power-On Self Test Procedures"
and the table following, "Diagnostic LEDs").
The blinking LEDs on the back of the
CPU
board indicate that the Sun-3/260 is
going through a self-test; when this self-test is successfully completed, a message
similar to the following will come onto your screen:t
Self '7esc Passed
~~
Sun
Workstatic~,
Medel Sun-3/2CO
$e~ies,
Sun-3 Keyboard
~ ~
ROM Rev --, __
~1B ~emory
installed, Serial
~
-
~~ Ether~ec
address --:--:--:--:--:--
Testing Megabytes of Memory ..• Compleced
J
l
'--------------------------------
For further infonnation describing how to bring up
UNIX,+
log on, and choose
your password, please see Installing UNIX on the Sun lVorkstation, part number
800-1521-xx.
CAUTION To avoid damage to internal circuitry, do not disconnect the keyboard while
the workstation is powered-up.
2.5. Power-On Self Test
Procedures
TI1e centrul processor board (CPU) of the Sun-3/260 has a programmable read-
oniy memory
(PROM)
chip which contains a program generally known as the
"monitor." The monitor program ccnn-oIs the operation of the system. betore the
UNIX
kernel takes control aLd was briefly discussed when we talked about using
the
RE~ET
button.
When system pcwer is first turned on, the monitor program runs a self-test pro-
cedu:e, a running commenrary of which is carried by the eight LEDs on t.'1e rear
tParts of this
messa~e ~lfe
conditional: the "Sun-:'/-" may not l:e disolayed, and the aa:;hed areas will vary,
based on
L'1C
system ycu ordcrec:. :ma
its
o~tio:1s.
+UNIX is a trademark of AT&T Beil Laboratories.
"'~
~~sun
••
~
r:'1lCtOsystems
Revision A of 10 October 1936