Thank you for using the Samsung Community and thank you for your question regarding your Samsung Television. I'd like to be of assistance to you with your question. I'll suggest a few potential solutions for you to try.
Samsung Product Support Website:
"How to Discharge or Cold Boot Your Samsung Television"
1. Unplug the TV from the power source. 2. ***Wait for at least 60 seconds to discharge any residual power.*** 3. Plug the TV back into the power source. 4. Disconnect all Devices & Cables from your Samsung Television IE: USB, HDMI, Digital Optical Output, Mouse, & Keyboard 5. Attempt to turn on the TV using the remote or the physical power button. 6. If your Samsung Television is plugged into a Power Strip or Surge Protector. (Test and ensure that the Power Strip or Surge Protector is Functioning Properly)
If these steps don't resolve the issue with your Samsung Television. I will provide additional information on how to seek Support for your Samsung Television here:
Or if you prefer you can also send a private message with your Information to a Samsung Moderator. @Samsung_Moderator
Thank you for using the Samsung Community and thank you for your question regarding your Samsung Television. Samsung Customer Support is here to assist you. Thank you!
I'd also like to suggest that you update your Samsung Televisions Applications. Also check for a Firmware Update. If a new Firmware Update is available for your model. Your Samsung Television will notify you onscreen that "A New Update is Available"
You can also try resetting the "Network Settings" on your Samsung Television as well. If these suggestions don't resolve your issue. You can continue with the steps below and try assigning a "Static IP" Address to your Samsung Television.
1. Manually assign an IP address to your Samsung TV 2. Manually Assign you DNS Server to 8.8.8.8
If you are still having issues with your Samsung Television. I'd like to make a few more suggestions to a assist you.
1. Replace your HDMI Cable 2. Change the HDMI Input from your XFINITY Steaming Box to another HDMI Input to your Samsung Television
Can you replicate the issue with another input device connected to your Samsung Television? Do the black lines continue to appear with the other device?
Do you have another Television in your home to test your XFINITY Box?
Also you can make sure that Input Signal Plus is enabled on your Samsung Television.
On your Samsung Television:
1. Press the "Settings" Button 2. Scroll down to the "General Tab" 3. Press the "OK / Enter" Button 4. Scroll down to "External Device Manager" 5. Press the "OK / Enter" Button 6. Scroll down to "Input Signal Plus"
For the sake of being thorough please ensure that ALL of your HDMI Ports have the "Green Circle" on all of your HDMI ports Green. Tab over to "Close" exit.
