Walmart customers who tried to pay with credit or debit cards on Thursday morning learned they had to use cash or checks only because of a failure with the retailer's computer systems. The problem was fixed by 11 a.m. Thursday.
Walmart released a statement on its website Thursday afternoon explaining the outage: "While doing some required maintenance on our data system, we had a breaker fail on the back-up system, which disrupted our ability to process some credit and debit card transactions this morning. Within a matter of minutes we began making some changes to try and minimize the impact to our customers and allow most credit transactions to be processed. We were able to restore the system back to normal in approximately 90 minutes."