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A horizontal bar moving from the bottom to the top of the screen on all channels is typically caused by a vertical sync (V-sync) issue or a problem with the television's display settings. This could indicate a malfunction in the television's internal circuitry, such as a failing video processor or a loose connection. Additionally, it might be related to interference from external devices or a defective cable. Troubleshooting these areas can help identify and resolve the issue.

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AnswerBot

1mo ago

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