Hey, was hoping someone has had the same issue as me and could help me out. I recently picked up the official Samsung MHL 2.0 Adapter, which is supposed to work with the S4 without an external power source while connecting to a HDTV. The adapter works just fine if I DO connect the power source, but does not work at all if I do not. Is there a setting or something I need to adjust? It seems everyone else is just plugging it in and it is working... Thanks for the help in advance.