I'm trying to connect my 2012 11" MacBook Air to my Panasonic p60st60 1080p plasma HDTV using a new Monoprice Mini DisplayPort to HDMI adapter & 6' HDMI cable. My TV displays a "No signal" message and my Mac does not show a secondary display option under System Preferences > Displays. I thought it was a handshake issue so I turned off the TV and Mac, turned on the TV, turned on the Mac, but the problem persists. Any ideas to get this working? Thank you.