15inch macbook pro w/ retina display not connecting to tv

Hi All,
I'm trying to connect my new macbook pro with retina display to my HD TV via the HDMI port on my computer. I connect the the cable to my computer and plug it into my TV, the screen flickers blue on my computer and then goes back to normal but my TV doesn't change at all and doesn't display anything new.
Can you please help...do I need to change settings on my computer or hit a function button on my mac?
Thank you in advance for helping!
-Mike

PROBLEM SOLVED!!! (I finally found the fix while searching in other threads...still very annoying that I had to do this with a $2,500 computer...Apple should provide a fix for this ASAP)
My Apple tech support guy came back a day earlier than expected, said to remove a couple of plist files, and it now works perfectly with HDMI, my projector, my external monitor, etc.
I had already removed one of the plist files a few days ago (which in itself hadn't worked), but when I removed the other, it did. I would suggest removing both.
Go to Finder.
In the root directory (MacBookPro or whatever your HD is called), go to Library, go to Preferences, find com.apple.windowserver.plist and put it into Trash
In your own user directory, go to Library (in Finder, click Go menu and hold Option key down to get to Library), go to Preferences, go to ByHost directory, find com.apple.windowserver.OE35739etc,etcxxxxxxxxxxx.plist, and put it into Trash.
You do not have to empty Trash.
Reboot computer.
The HDMI should be working now, and permanently so.

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