Not a lot of information to go off there! You need to provide some more info.. are you seeing anything on screen? Have to tried going to different hdmi ports with your TV remote? Is there a light on the stream box etc. can you get on stream box but nothing is working?
———— 65” Sky Glass ocean blue, Sky Live, 4 streaming pucks and BT FTTP 900 (circa 1.2 Gbps download). Former Sky Q, Sky+ HD and Sky+ customer.