[rescue] newest rescue (failure/success/failure)

John Hudak jjhudak at gmail.com
Sat Feb 6 14:46:57 CST 2016

yes, my thinking exactly.  Not knowing the pedigree of the machine, I'd
approach it as a restoration project.

Remove everything, through cleaning.
I rely on cleaning contacts on boards/connectors/switches with a product
called Deoxit. IMHO, simply the best.

I little mechanical effort on accessible contacts (e.g. red ruby eraser and
alcohol) + deoxit contact preserver works wonders as well.

Spray inaccessable places.

If you are really brave....
In the bad old days when we made our own boards, after the wave solder
machine, put the boards in a dishwasher, some special detergent (which I
can't remember the name but we have used regular liquid for dishwashing
machines on occason).  Did a short wash cycle and regulated the dryer temp
to 120 degrees (yea we modified the washer)...or air dried them...then
again, we were making low volume boards....
Unless you have a real need to do this on vintage stuff, I wouldnt...

Have fun.

On Sat, Feb 6, 2016 at 8:59 AM, Sandwich Maker <adh at an.bradford.ma.us>

> " From: Walter Belgers <walter+rescue at belgers.com>
> "
> " On 6 feb. 2016, at 13:17, Walter Belgers <walter+rescue at belgers.com>
> wrote:
> " > I took out the P4 board, but the error remains. I took out memory
> board 3
> " and
> " > 2, but the error remains. I reseated the CPU board but the error
> remains.
> " > Aargh, what is happening? I cannot get it to work any more :(
> "
> " It seems that the connection between the VME boards and the backplane is
> not
> " well sometimes. (Dust? Corrosion?) By reseating the boards (repeatedly)
> I got
> " it to start up again. But not with the P4 graphics card. (Anybody have a
> spare
> " P4 colour graphics card?)
> this makes me wonder if a little contact cleaner might be called for,
> and whether there might be a particular problem with the graphics
> card's connector or its slot in the cage.
> ________________________________________________________________________
> Andrew Hay                                  the genius nature
> internet rambler                            is to see what all have seen
> adh at an.bradford.ma.us                       and think what none thought
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