Make sure the signal on your TV is the same as the input the HDMI is in( i know this sounds simple but this happens to me a lot). you could also try going under (personalize> Display>Screen resolution - This is for windows 7 but i think its the same) And try clicking the identify/detect buttons and see if that changes anything.
Make sure the signal on your TV is the same as the input the HDMI is in( i know this sounds simple but this happens to me a lot). you could also try going under (personalize> Display>Screen resolution - This is for windows 7 but i think its the same) And try clicking the identify/detect buttons and see if that changes anything.