MacBook Pro will not detect displays. . .

I found this link, and it best discribes what is happening on my macbook. I have a thunderbolt to cdmi cord that I use on my TV. Then all of a sudden, it just stopped working. . . My screen flashes black for about a second like its about to connect to my TV, but then nothing happens. Please help. . .
I have a MacBook Pro 13 Mid-2012 running 10.10.1
Here's the link i found my macbook pro does not detect external display anymore

Just one bit of data...
I don't know what the deal is, but I had a similar situation. (It all worked fine, then I upgraded to 10.9.5 and it didn't work any more, but then I upgraded to 10.10 and then it worked. Then it wouldn't. but once in a while it would. It made no sense. ) In the end I got a different (more expensive) adapter and cable and everything works properly.

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Message was edited by: BradleyMG
Message was edited by: BradleyMG

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Message was edited by: Kardon
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MacBook Pro will not detect displays. . .

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