The banking giant said the problem was an internal glitch.
"We have a technology problem regarding customers' balance information," Chase said in a statement. "It has nothing to do with cyber threats. It is an internal issue. We are very sorry to our customers for the inconvenience. This began earlier this evening. It is not confined to the West Coast."
The problem lasted a few hours. It was resolved around 7:30 p.m. PT.
Last week, the bank said it was victimized by a "distributed denial of service" attack. Chase websites were replaced with a message that said the system was temporarily down, but mobile apps were still available.
