Card gets declined with a swipe, but accepts it when entered manually

[VDO]

This morning, the square terminal kept declining a card during the swipe. It didn't have a chip.

We ended up manually entering the card number in the terminal and it accepted it.

It is the first time.  Not sure if there is something we need to look for.

-Sachin

[Kassi_]

Hey there, @VDO -

Oh man! Definitely want to get this corrected for you. Let's start off with some troubleshooting steps to get your Terminal back up and running.

Try these steps for payment issues. 

If that doesn't work - another issue could be an issue with the customer's card too. 

Has this happened with any other customers or just the one?