[rescue] Sun 3/80 mobo wanted

[Ian Finder]

hey bear are you local to Seattle?

I have two last known working 3/80s you can have a look at to beep out the
traces.

I may be able to give Kurt one later--

- Ian


On Tue, Aug 13, 2013 at 12:06 PM, r.stricklin <bear at typewritten.org> wrote:

> On Aug 13, 2013, at 11:51 AM, Kurt Nowak wrote:
>
> > By chance does anyone have a 3/80 mainboard lying around. I fired mine up
> > after years and it no longer powers up. I first thought it was the PS,
> but
> > I replaced it with a known working one from an SS1 and it still was dead.
> > Any possible ideas would be appreciated.
>
> I have three that have all failed the same way - by developing a carbon arc
> inside the PCB (in approximately the same location on each board). If you
> are
> amenable, I'd like a crack at repairing yours, which would theoretically
> allow
> me a better shot at tracing out the various circuit paths and possibly
> ultimately to successfully resurrecting at least one of mine.
>
> The first step to fixing my problem is dremeling out the carbonized
> sections
> of PCB, and re-filling the hole with resin. My initial attempts with the
> dremel suggest (as one might imagine) that it is basically impossible to
> clear
> the carbon and not destroy the copper tracks. Thus, the interest in tracing
> out an intact board.
>
> Or maybe somebody knows of a solvent that would be of use here, to
> preferentially dissolve the carbonized fiberglass, and leave the rest of it
> alone?
>
>
> ok
> _______________________________________________
> rescue list - http://www.sunhelp.org/mailman/listinfo/rescue
>



-- 
   Ian Finder
   (206) 395-MIPS
   ian.finder at gmail.com