BJwright- Can you confirm if you have the most update to date software? The version can be found under the menu in Support > Contact Samsung. Also, have you attempted a full factory reset since this began?
DaveB2- It seems your television will require service, I've gone ahead and sent you a private message concerning this. I look forward to hearing from you!
Service came out last week and replaced the main board. It didn't fix the problem. The TV went black again last night and again this morning. I asked the tech why he didn't replace the power supply too. He claimed the power supply wouldn't have these symptoms.
Samsung, how about actually diagnosing and fixing this problem???
What type of HDMI cable were you using when yu experienced the problem? What type of HDMI cable are you using now? I am using the HDMI cable that came with my new XBOX One S with JS9000 and the screen goes black for 2-3 seconds periodically. Thanks!