2003 Honda Civic

While driving on the freeway, after 1.5 hours, my radio went dead. A few seconds later the ABS light came on, then the seat belt light came on, then the brake light, then the engine llight, and then the entire dashboard went dead--all dials fell to zero at the same time. I continued to drive until the engine surged and then cut off. I pulled to the side of the freeway.

I called AAA and was about to have the car towed but I was out of town and didn't know where to go, so I tried the engine and it started up and I drove the car to my destination, although the check engine light stayed on.

This happened before, about a month ago. The first time the engine didn't cut off but everything else was the same. I took it to a Honda dealer and they inspected it and said that they couldn't find anything wrong. Any ideas what might be causing this?