HP 67 magnetic card not working

[Trond]

(12-06-2019 04:35 PM)mfleming Wrote:  I recall from an earlier thread on this subject that someone recommended using a Staedtler Mars plastic eraser to gently clean the magnetic side of the card. It was used to revive a card that would not record, so perhaps it will work for your case of faulty readback.

Interesting! I'll try this.