How to Fix Samsung AU8000 No Power / Screen Dark

Quick Diagnosis

A Samsung AU8000 TV that shows no power or standby light is often experiencing a physical power board lockup. This is commonly caused by surge protector drops or residual capacitance holding the processor in a locked shutdown state.

Technical diagnostic blueprint diagram for the Samsung AU8000 showing symptoms of No Power / Screen Dark.

Step-by-Step Resolution

  1. 1

    Unplug the TV's power cord directly from the wall outlet or surge protector board.

  2. 2

    Unplug the power connector tip from the DC port on the back panel of the TV.

  3. 3

    Locate the physical Power button on the underside of the TV bezel (typically directly below the center Samsung logo).

  4. 4

    Press and hold the physical Power button down firmly for 30 seconds to drain all residual capacitance from the power board.

  5. 5

    Leave the TV unplugged for a full 2 minutes to allow the processor registers to clear completely.

  6. 6

    Plug the power cord firmly back into the TV's back panel DC port first.

  7. 7

    Connect the power plug directly to a verified working wall outlet (bypass surge protectors to rule out switch faults).

  8. 8

    Press the Power button on the TV chassis to test startup.

Alternative Causes & Edge Cases

  • On Samsung RU7100 models, a dark screen can indicate a physical failure in one of the LED backlight strip channels, requiring complete panel backlight replacement.
  • On Samsung QLED series, a dark screen can be caused by a pinched One Connect fiber optic cable, preventing power and video signals from reaching the panel.