The issue was eventually resolved more than an hour later, according to the CES official Twitter account.
The lights went dark just before 11:30 a.m. PT in the convention's Central Hall. The CES Twitter account said Nevada Power was addressing the outage, and access to the show was being restricted until power could be restored.
Photos and videos posted to social media during the outage showed hundreds of people milling around the darkened and quiet convention halls. An announcement over the loudspeakers told convention-goers the cause of the outage was being investigated. Many of the high-tech displays showing off the latest electronics were not visible inside the hall.
CES, held every January in Las Vegas, is a major platform for technology companies to debut new products and prototypes. This year’s show continues through Friday.