HP-41CV Fullnut CPU-board wanted

[BobVA]

(02-04-2015 12:13 PM)Martin Hepperle Wrote:  ... and the connectors between the boards seem to be okay.

If it's got the elastomeric rubber "zebra strip" interconnect, I'd be suspicious of that. They can cause all kinds of strange issues.

If you can possibly swap it for another or, better yet, one of the flex circuit interconnects that might aid your trouble-shooting.

Bob