Connect tv hdmi

I'm really getting frustrated with apple and on the brink of donating my macbooks.  i have two macbooks that were recently updated to mountain lion and now i can't connect to a tv via the hdmi port on the tv. I've done this many times with the same cable and same tv but now with new software upgrades, it is not working. 
The screen on the macbook pro flashes blue but the TV shows no source.  I've tried adjusting the resolution as many people on this forum suggest but that doesn't solve the problem. any ideas?

When on the first picture panel, click on the "Detect" button.  It should then see the TV as a monitor, assuming the TV is on and the HDMI input that the laptop is connect to is selected.Then that same picture panel showed show the TV as "2"

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