Hello r00t, The below link is the method that worked for us to recover the joule. It seems like the sequence of connecting and disconnecting cables do matter. https://github.com/ROBOTIS-GIT/turtlebot3/issues/77 --- [Visit Topic](https://discourse.ros.org/t/waffle-hdmi-no-signal/2687/2) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: