you can get a DVI/VGA adapter. You connect it to the HDMI TV cable and the DVI or VGA end depending on your I/O on your GPU will connect.
my main monitor is connected to dvi what i am trying to do is send hdmi signal to the screencast so it can send a wireless signal to my hdtv. if i use a hdmi cable directly to the tv it works fine i want to move the pc to another room.
my problem is no display device is recognised when i plug the hdmi to the screencast .thats why i was wondering if there was a way to force the hdmi output