HP 41C DOES NOT BEEP
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08-30-2014, 08:25 PM
(This post was last modified: 08-30-2014 08:27 PM by Geoff Quickfall.)
Post: #18
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RE: HP 41C DOES NOT BEEP
AHHHHHH!
that explains a lot. see the PCB that has been removed from the board that looks like yours? That is the CX version containing the extended functions, memory and timing chip. So your board is a standard halfnut with the CX portion removed. Good research, should have checked with Diego first. You can see the attachment points for the board to convert it to a CX. They are the four contact solder points on either side of the keyboard PCA. d8-) so in a nutshell or halfshell you have a:
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