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**rprosperi** · 11-20-2017, 02:29 AM

(11-19-2017 09:25 PM)AndiGer Wrote: I have here some cards - also the diagnostic programs SD-15A and SD-15C from orignal Standard Pac - that run thru the card reader of more than one calc Hp-67 and HP-97 smoothly but at the end of the card slip thru the reader causing Error. Some read one side ok the other side slips. Other cards read well both sides.
Is there a recommended treatment to make the cards read well again?
I remember for TI cards ... spit on them ...

Here is one solution:

http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=63