[rescue] 3-1-4-3 beep error codes on Sun Ultra20 m2 system

Jerry Kemp sun.mail.list47 at oryx.us
Tue Jan 9 03:45:20 CST 2018

Hello Andrew,

Thank you for the post.

I had seen some of the pages under /ultra20.ws/ , but I had overlooked this one.

the motherboard LED code for me is 80, which on this page provided maps to "Reserved".

My understanding is/was that the Ultra20 M2 motherboard was a completely different motherboard than was used on the original Ultra 
20.  I can share that my motherboard looks nothing like the motherboard layout depicted in the picture(s).

Thanks again,


On 08/01/18 20:59, Andrew M. Hoerter wrote:
> On Mon, Jan 08, 2018 at 05:57:13PM -0600, Jerry Kemp wrote:
>> Anyway, start with plugging it in.  Had not used this box in a few years. Fan(s) wind up to full speed, but no output what-so-ever 
>> on the monitor. Fans never wind down.
>> [...]
>> I'm guessing that the motherboard has died, and I am left with its components to find new homes for.
>> Wanted to post here first to see if anyone else had any thoughts or comments.
> You did say that you checked the Sun documentation already, but I
> found a page suggesting that there's a 7-segment LED on the motherboard showing POST progress codes.  If you haven't already
> found that, seems like it might be helpful.  Or maybe this doesn't apply to your particular model.  In any case, here it is:
> <https://docs.oracle.com/cd/E19127-01/ultra20.ws/819-2146-13/AppC.html>
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