HP-71b Card reader "WRN: R/W Error"

[Nenad (Croatia)]

Unfortunately, I have a set of 5 cards+abrasive red card available and have tried them all. They are intact-AFAIK they have not been used before in other card readers. The result remains the same.

Can I somehow "format" them?

(11-11-2018 04:00 AM)Joe Horn Wrote:  IIRC, if the timing track on a card gets messed up, the card will never work correctly, so the problem MIGHT be that particular card. So I'd suggest trying as many other cards as you can get your hands on. If NONE of them work, then the problem probably lies elsewhere.