Hey friend i was facing the same problem with my lappy. I got the problem solved as i changed my resolution settings. So your work is find your tv resolution(from net or from your tv manual) then just change the settings. But for that i think you have to connect a device which shows display from your pc as withoout seeing anything you cannot change the settings
. It was easy for me as i was connrcting lappy on which i was able to see dual displays.