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Hello, my name is***** it flickering on all sources? What type of cable is used to connect your cable box to your TV? If it's HDMI, that's the first thing to switch out. It has 16 connectors, and they can go out on their own.
You can upload it to YouTube and send me the link. Is it flickering on all sources?
That is beyond my skill level, I'll open the question back up to all experts.