Roku users investigate unexplained TV start-ups after software update

Some Roku TVs and streaming devices have reportedly been turning on by themselves, sometimes in the middle of the night, since Roku OS 15.3 arrived in August 2026. The timing has led users to suspect a software bug, although the update did not include changes to autoplay or power management, and Roku has not officially identified the cause.

Possible triggers include HDMI-CEC signals from connected devices and Roku’s Fast TV Start setting, which keeps the operating system running in the background. The article suggests updating to Roku OS 16, released in October, and trying changes to these settings, but says there is no guaranteed fix while the underlying cause remains unknown.