I would hold Power and Vol Doen until it reboots. Might be as long as a minute. Try it multiple times.
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Bill
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Galaxy Fold 5 512g(VZW), Galaxy Book (original, VZW), Tab S8 Ultra, Tab S4, Galaxy Watch6Classic 47mm(VZW), Galaxy Watch5Pro(VZW), M8 Smart Monitor, NEO 55" QN90D TV