There can be several causes for a black screen on a TV, including:

  1. Loose or damaged cables – This can result in a failure to receive a video signal.
  2. Power issue – A problem with the TV’s power supply or failure of the TV’s power board can cause the screen to remain black.
  3. Malfunctioning components – A failed inverter board, backlight, or other internal component can cause the TV to display a black screen.
  4. Software issues – Problems with the TV’s firmware or a software update gone wrong can also cause a black screen.
  5. Physical damage – A damaged screen or other physical damage to the TV can result in a black display.

It is recommended to consult with a professional repair technician / tv engineer to diagnose and repair the problem.