Why Wont My Hdmi Adapter Work On My Ipad. Thats to plug in the lightning cable when using HDMI. You will notice on the adapter there is a lightening port input.
As far as iOS is concerned HDMI works at the device level and responds according to the EDID of the display device - if the display announces via its EDID it handles audio as well then the iPad will switch audio over to the display device in accordance with HDCP and the HDMI spec. He further goes on to explain why the Lightning adapter cant stream raw HDMI. The adapter plugs into the Lightning connector which is the port normally used to charge the tablet and an HDMI cable can be plugged into the other side allowing you to hook it up to your TV.
Disconnect both ends of your cable and reconnect the cable to your device and TV.
HDMI connections dont fit as tightly as a component or composite video connection and sometimes slip out. If this happens often consider getting locks for your HDMI cables or self-locking cables. The reason it doesnt work is because the HDMI adapter requires power. Theres a set of kernel modules that handle the low level data transfer and HDMI output but thats about it.