I have two monitors connected via DVI and a 4K TV connected via HDMI.  My 680 will recognize all three displays however the TV is in the living room and I'd like to duplicate one of my monitors onto the TV.  Unfortunately despite using the Nvidia control panel I can't get a duplicated display to occur.  It works perfectly fine extending the display but that's not what I'm looking for.  In fact the control panel has the monitors arranged in a configuration that suggests display 2 and 3 are cloned however they aren't.  I've read posts on issues with the DisplayPort and no signal on the HDMI port but I haven't read anything about not being able to duplicate a display over to the HDMI side.  I'm trying to avoid getting a video distributer so any help would be appreciated.