Posts: 1,830
Threads: 113
Joined: Aug 2005
Nice photo spread there!
Most of the 41s I've opened don't have the nuts on the screw posts, (I did open one that had that arrangement.) It seems like a much better plan than using the gripping power of the screws exclusively to press the processor PCB to the keyboard PCB, particularly given the tendency of the posts to crack with age and abuse. I also recognized a symptom you mentioned as being caused by static discharge - the strange behavior on "SIZE" and storing to registers. I have one calculator that starts showing garbled program lines when size exceeds a certain value. I had concluded that this was a RAM problem, or possibly something with the CPU. Can you comment on whether one or the other is more likely? How would you go about distinguishing the two? (I might send it to you for repair, but mail between OZ and the US takes forever. 8)