>The conductive part of Z-stipes is usually carbon in
>rubber. Several hundreds of ohms resistance, which is
>nothing since the display draws nearly no current

I used to service a series of computers made by Harris, which had daughter
boards mounted on a mother board, and connected by these things. Gave us no
end of trouble, until they changed to another type of insert which had thin
gold coated metal strips wrapped around the silicon rubber strip. The carbon
conductive strips seem to be extremely finicky despite the incessant
cleaning and careful use of the torque driver to the correct setting.

The carbon filled ones had obviously been a problem for many years before
they changed.

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