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I'm sorry the LG Stylo will not support either HDMI or MHL. The phone isn't capable of connecting to TV that is why it is not giving any output to TV. See the HDMI/MHL specs in this article --> http://gadgets.ndtv.com/lg-g-stylo-2586
However you should be able to stream through Chromecast. If you have any questions or would like any additional information, please don't hesitate to ask