Hi all,
I was fixing a HP-67 card reader and I was successful in that.
I tested the calculator and card reader before assembling it again and all went well.
But after putting the screws on, the calculator doesn't work correctly anymore, when I turn it ON, I hear the card engine motor for about 0,25 sec. and then the word Error appears in the display, if I press any key the same thin happens again.
I disassembled the calculator and it stated working again ... but if I squeeze it a bit I get the bad symptoms again.
I don't have the minimum clue on how to solve this (I mean for good, going to the core of the problem), can anybody help me?