If you've already replaced the card reader and a particular seat is still having issues with the card reader; please try the following:

(NOTE: You will need to restart Table for each test)

1. Try replacing player box with the working one and test it
2. Try replacing Harness Cable from Distribution Board to Player Box with working seat and test it
3. Replace small USB Cable for the Card reader (if no spare, try switching it with the working seat and try again)
4. Reseat connection on player box (2 cables, USB and White Power Cable and try again)
5. Reseat connection on Distribution Board (2 cables, USB and White Power Cable and try again)


Let us know the results. 

Thank you