Repairing A4000 leaky NiCd damage?

[Alexandre Souza]

I've repaired many...I usually take off all the components of the affected
area, wash it with vinegar (!) to neutralize the electrolyte, wash again
with alchool or MEK (Metil-Etil-Ketone, cancerous and very dangerous
solvent) and rebuild the traces with very thin (awg 30) wire-wrap wire. It
always works (for me) :)

I've spent someday 6 hours to recover a board. In Brazil it is worth it!

good luck!

On Fri, Jan 2, 2015 at 7:36 AM, Peter Corlett <abuse at cabal.org.uk> wrote:

> On Fri, Jan 02, 2015 at 01:23:14AM -0500, Ethan Dicks wrote:
> [...]
>
> You didn't say what kind of A4000, but I'm assuming you are referring to
> the
> Amiga, as this is a known problem.
>
> > I know the general process, but I'm curious if anyone has done this
> > specifically to an A4000 board and has any tips.  As I said, I'm probably
> > going to have to pull the DIMM socket to get to all the damage.
>
> I've never had much luck with this kind of repair, but the A4000 repair
> always
> sounded particularly difficult and liable to fail.  Still, if you've got
> the
> right tools and are patient and careful, you won't be worse off than if you
> didn't bother at all.
>
> > Barring success from running a dozen or so repair wires, would anyone
> happen
> > to have a lead on an A4000 motherboard?  Everything else in the machine
> > should be good, the Daughter Card, the CPU card, etc...
>
> I've got a surplus spare from a part-stripped carcass I bought back in
> 2001 to
> try and clear a fault in my own A4000.  However, a motherboard swap failed
> to
> clear the fault I had.  What this would imply is that both boards are OK
> since
> the failure was sufficiently bizarre that it was unlikely that both would
> fail
> identically, but since I've not conclusively seen either of them work for
> nearly two decades, I wouldn't like to offer any sort of guarantee.
>
> These boards also turn up on eBay in the USA, which might be a better
> bet.  As
> far as I can tell, the same boards were used in both NTSC and PAL machines
> and
> a jumper configures the video standard.  (I sometimes re-jumpered mine for
> NTSC
> to reduce display flicker.)
>
>