how to reset samsung tv
Samsung Television Tech Tip: No Sources Detected on HDMI 4

QN**Q TVs: No Sources Detected on HDMI 4

Issue: No Sources Detected on HDMI 4

Models: QN82Q90RAFXZA, QN75Q90RAFXZA, QN65Q90RAFXZA, QN98Q900RBFXZA, QN82Q900RBFXZA, QN75Q900RBFXZA, QN65Q900RBFXZA

Solution: Update TV’s software

Process:

 

  1. Update the software to version 0 or higher.
  2. Wait for the update process to The TV will turn itself off and then on again.
  3. Cold reset the TV by method a or b below:
    1. Unplug the Power cord for about 20 seconds, or
    2. Press and hold the Power button on the remote until the TV turns off and then back
  4. Go to Settings > Support > About This TV.
  5. Verify that Software Version displays 0 or higher and the second Sub-micom Version displays 6012 or higher as shown in the image below.

 

Caution: Do not unplug the AC cord, turn the TV off, or press the remote’s power button until the TV has finished

updating the software.