Re: HP 35 Keyboard Malfunction Message #2 Posted by John Robinson on 7 Aug 2011, 11:53 p.m., in response to message #1 by aj04062
I'd look for corrosion shorting two of the "row" lines, which could be on the keyboard circuit board or on the logic circuit board. Although if two lines were shorted, then you would expect odd behaviour from two rows of keys. Maybe there is somewhat of a short from the row line to another line causing the problem.
Have you tested for continuity from a keyboard row all the way through to the CPU chip ?
Cheers,
John
|