Black TV Screen Solution 3: Try using different or new cables for the component you are currently using.-Use a new COAX CABLE for SAT BOX and CABLE BOX.-Use a new HDMI CABLE for ROKU, AMAZON, DVD, BLU-RAY, X-BOX, PlayStation, etc.-Make sure there is no damage where the cables connect into. NOTE: If after using a new CABLE the BLACK SCREEN is now gone and you can see the picture and sound, the hxcPj8.