But how could a flaky card reader cause intermittent problems with the data once they have been read into memory? It seems to me that the problem is...
Look at the power supplies in the floor of the organ. One of them will have a small knob or screw-driver adjustable pot marked "card reader voltage"...
My first thought concerning mrdc2000's unnamed builder was M&O. I don't have any real information to support that idea, just things I've heard about...
I'm still betting on it being a problem of alignment -- it's really hard to get the board back into the socket and have all the prongs grab the right...