Repairing A4000 leaky NiCd damage?

Tothwolf tothwolf at
Fri Jan 2 19:15:17 CST 2015

On Fri, 2 Jan 2015, Alexandre Souza wrote:
> On Fri, Jan 2, 2015 at 7:36 AM, Peter Corlett <abuse at> 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.
> 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!

What is the purpose of using MEK (Methyl-Ethyl-Ketone) on a pc board? I 
would be worried it could potentially damage the rubber end seals of 
electrolytics or any styrene or ABS plastic encapsulated components.

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