Tom P wrote:
>
> I have been cleaning a few more keyboards and I was wondering if
> anyone else had the same experiences as I have.
>
> I now have 2 keyboards thats are not fully functional. When I
> examine the upper mylar layer, Inotice that the keys that do not work
> are all in a series, connected to _one_ trace. That can hardly be a
> coincidence.
>
> I clean the trace, but to no avail. Has anyone else pegged the
> non-functioning to the upper trace only ? Maybe its the upper trace
> that is the only part that can fail, but I cant figure out why.
> Maybe if I got some of the silver conductive trace material (Duotite
> ?) I could put some down and see if it works.
>
I found that the traces on my Duo keyboard where they plug into the
connector were worn in the center of the trace. Evidently the contact
in the holder is thin and it wears in the middle of the trace. It
looked good with the naked eye, but when I used my loupe, it was easily
discirnable. I trimmed the edge of the contact and the plastic
stiffener, by about 1/8 inch and inserted it and it worked. On my
keyboard the control, option, command and esc keys did not work.
Robert
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