Can you share a link to the mini to HDMI adapter you used?
I have two samsung tv's - 52A650 and 55B7000. The output from a MacBook Pro with a mini display port to HDMI adapter works perfectly when plugged into any HDMI input on the 52A650 but will not work when plugged into any HDMI input on the 55B7000. The 7000 says 'no signal' while the MacBook Pro shows the Samsung is detected properly. I have seen lots of questions posted about this but never an explanation as to the cause or a workable solution. The 7000 software is up to date.