SUMMARY - LED Status Codes for 3/60

From: Paul Emerson (
Date: Fri Mar 05 1993 - 07:09:54 CST

Great going Sun Managers.

My orginal posting was:
> We have just come in posession of a 3/60, which we want to use as an
> X-terminal using the Xkernel. I tossed my Sun-3 manuals years ago,
> so I have no refererce manuals. I hope the collective brain of
> Sun Mangers can help. The problem is that the 3/60 doesn't seem to
> get very far in the power up process. I think it is stuck in the
> diag routines, because we get nothing on the tube and only
> a LED status code. Does any one have the list of status codes? I do remember> a page in the manual containing this information. The code that is displayed
> appears to be: 1 0 0 0 0 1 1 1. I would be interested in the list of codes
> just in case I get past this problem to face another.

Thanks to all who replied:

It's nice to know we truly have an international crowd on Sun Managers.

I received many replys listing the LED status codes. Thanks to all who
took the time to type up these tables. Here is one from John Valdes.

(When looking at the back of the 3/60, btw, LED 7 is the one on the
left, 0 on the right)

3/60 LED Diagnostics ( 0 = OFF, @ = ON, * = Blinking )

PROM Checksum Test O O O O O O O @
Context Register Test O O O O O O @ @
Segment Map Rd/Wr Test O O O O O @ O O
Segment Map Address Test O O O O O @ O @
Page Map Test O O O O O @ @ O
Memory Path Data Test O O O O O @ @ @
NXM Bus Error Test O O O O @ O O O
Interrupt Test O O O O @ O O @
TOD Clock Interrupt Test O O O O @ O @ O
MMU Protection/Status Tests O O O O @ O @ @
Parity Error Test (#1) O O O O @ @ @ O
Parity Error Test (#2) O O O O @ @ @ @
Memory Test O O O @ 0 0 0 O
Error Found @ O O O 0 0 0 0
Exception Class Error Found O @ O O O O O O
Self-Test Done (LED Flashing) O O * O O O O O
Reset @ @ @ @ @ @ @ @
UNIX Running (Walking Ones) @->O->O->O->O->0->O->O

When an error occurs during the self tests, LED 7 will light up along
with LEDs 0-4 indicating which test failed. Your error appears to be
in the memory path data test. You may want to check that all the SIMMs
are seated properly, and that the memory jumpers are set properly (the
jumpers are located in a block to the left of the SIMM banks, near the
battery in the upper left corner when looking at the motherboard from
the connector end; the jumpers are labeled; make sure all the jumpers
are in place up to the total amount of memory installed, eg., if there
is 16MB of memory installed, the jumpers labeled 4MB, 8MB, 12MB and
16MB must all be shorted; BTW, the jumper labeled EXTXUR next to the
memory jumpers selects your ethernet type: open for thin, shorted for
thick (external transceiver)). You can get more detailed diagnostic
messages if you power up the system with the switch on the back of the
3/60 set to 'DIAG' and attach a terminal to serial port A (9600 baud, 8
data bits, 1 stop bit, no parity).


I also received suggestions to connect a dumb terminal to tty A
(9600,8bit, no parity and 1 stop) and flip the diagnostic switch to get
diag output on the terminal. (Yeah, I am starting to remember now.
Sun3 was a long time ago for me).


Paul Emerson                             | Global Technology Associates, Inc.
President                                | 7198 Harbor Heights Circle 
Email:                      | Orlando, FL 32835
CIS: 72355,171                           | Tel 407-296-3636 FAX 407-295-1954

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