How can I turn off my Joule? Philip Cowles May 24, 2018 16:41 Updated Follow Hold down the main front interval button and the "+" button together for 3 seconds. Related articles Why do I have no display on my computer? I lost/can't find my download cable, how can I download my Joule? Why can't I download my Joule? Why isn't my PowerTap computer showing watts? Comments 0 comments Please sign in to leave a comment.