6128 keyboard woes *** SOLVED ***

[Bryce]

Well you certainly get my vote for "Most artistic / creative repair job 2012". I admire your perseverance. I would have given up two days earlier

Bryce.

[00WReX]

Nice one mate, that's good to hear    very nice of ynot.zer0 as well 

Cheers,
Shane

[Gryzor]

Looks like a proper mess, but who cares, as long as it works. So, from what I understand it was a matter of conductivity after all?

[ervin]

 

If you think that looks like a mess, you should have seen how it looked at various points during all the crazy ideas I tried.
It's amazing that the thing is still intact!

Looks like a proper mess, but who cares, as long as it works. So, from what I understand it was a matter of conductivity after all?

Yes, sort of - once I had started butchering the membrane (trying to figure out if it was indeed the cause of my original keyboard problems), it did indeed become a matter of conductivity.

But the original problem had nothing to do with the membrane. 
It was caused by a dead pin to the AY chip. This was fixed with a quick application of conductive silver paint.
(When I say quick, I mean after all the time spent figuring out where the actual problem was, using a multimeter).

I'm still amazed that the butchered membrane works!