Samsung QN800D - Troubleshooting; Picture Issues; The Screen Is Flashing or Has Become Dark

Troubleshooting
The following are troubleshooting solutions for each problem.
Picture Issues
When the TV has trouble with the picture, these steps may help resolve the problem.
The screen is ashing or has become dark
If your TV is  or dimming sporadically, you may need to disable some of the energy  features.
Disable Brightness Optimisation, Energy Saving Solution, Motion Lighting or Contrast Enhancer.
• (left directional button) Settings All Settings General & Privacy Power and Energy Saving
Brightness Optimisation Try Now
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(left directional button) Settings All Settings General & Privacy Power and Energy Saving
Energy Saving Solution Try Now
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(left directional button) Settings All Settings General & Privacy Power and Energy Saving
Motion Lighting Try Now
• (left directional button) Settings All Settings Picture Expert Settings Contrast Enhancer
Try Now
Run Picture Test. When the tested image quality is normal, check the signal of the connected device.
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(left directional button) Settings Support Device Care Self Diagnosis Picture Test
Try Now
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