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Unfortunately, none of these occur (can neither see the computer screen on my TVnor be able to drag windows onto the extended screen).

Previously, this is when the extended screen from the Macbook would appear on the TV and I can drag windows onto the screen. The Macbook's screen will flash once and the TV will go from the blue "No Signal" screen to a blank black screen. Basically, the Macbook is no longer able to detect the display! I connect the TV to the laptop and ensure that the connection settings are proper (ie, I have connected to HDMI 1 and proeprly set the TV's input to HDMI 1 as well). However, the last couple days I have been running into some major problems with this display connection and has left me quite confused and frustrated. The cable had been working out great for me since I bought it the audio and video quality was exceptional and it gave me an almost perfect HD experience whenever I watched shows on my TV via my Macbook. I bought an HDMI - Thunderbolt cable months ago in order to watch movies, TV shows and whatnot on my TV (Sony Bravia). I have a 13-inch Macbook Pro with Mountain Lion installed.