Theres no reason you shouldn't be able to, check the TV is accepting the right input, and that if you are running a system with a dedicated GPU the HDMI lead is plugged into the card itself and not the motherboard.
Theres no reason you shouldn't be able to, check the TV is accepting the right input, and that if you are running a system with a dedicated GPU the HDMI lead is plugged into the card itself and not the motherboard.