Verifone P400 Locking Up.
We have had several instances where a Verifone P400 payment terminal locks up after the customer runs the card. On the POS screen it says "follow instructions on payment terminal" and the loading icon (spinning circle) shows continually. The payment terminal doesn't show anything. The only way we have been able to correct it is to close Lightspeed Retail and re-open it. Sometimes the payment goes through, and sometimes it doesn't. Has anyone experienced this?