HP-65 Card Reader Problem Help

[Phoenix Rob]

Hello all,

I have been a viewing this site for many years but decided to join today! I have an HP-65 that has a card read/write problem. I replaced the gummy wheel and now the cards pass through without problems, but I cannot read or write. Can someone with experience in this area point to what I should check to fix this problem? Also, how critical is the card reader speed?

Thanks!

Rob