Best answer by Airgetlam
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Samsung q7f keeps changing to tv speaker from hdmi arc
Everytime i shut off the tv it goes back to the tv speaker
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Hmmm. That's odd. The first thing I'd try is actually unplugging the TV from the wall, and waiting for 2 minutes before plugging it in. My guess is there's a broken handshake on the HDMI-CEC connection, which would only be reset by a power cycle.
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