If you're having trouble swiping a credit card, this topic can help you
resolve the problem.
Check that the card reader is connected to the computer, and that the
computer is on.
The light on the card reader should be green, indicating that the card
reader is ready.
Be sure the card's magnetic stripe is facing the right direction (toward
Swipe the card only once, starting from either end of the card reader.
Don't hold the card at an angle.
Swipe the card quickly.
If a card can't be read, it may have a damaged magnetic stripe. Try
wiping off the magnetic stripe to remove any residue.
If the light on the card reader turns red, this indicates a "bad
read." If this occurs frequently, the card reader's magnetic head may
need cleaning. You can purchase cleaning cards at office supply stores.
If the card reader beeps or blinks in an unusual way, or if card data is
incomplete or garbled, the card reader may be damaged or improperly configured.
Contact Customer Support.