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Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, please bear with us; re-confirm and post back with the complete model numbers of the TV and devices connected to it. Additionally, please describe how these devices are connected to the TV using what kind of cable(s).
And the "...complete model numbers..." please?
Let's try two (2) tests:
Please post back results / observations of the above once tried.
Have you checked / replaced the HDMI cable?
Sorry "...direct connect..." ?
What is the "...direct connect..." please? ...or would it be the cable box directly connected to the Samsung TV by HDMI?
And is this a fresh / new install? ...or were all these working together before as expected and this no picture/sound just a recent issue?
Bear with me for a final test; use another known to be good HDMI capable source such as a DVD player (from another TV) + its also known to be good HDMI cable and directly connect to the Samsung TV's HDMI port (try all).