I have model#UN40MU6290 and I have this same issue. Every time I power off my TV and power it back on the wifi connection drops and the only way to get WiFi back is holding the power button on the remote to restart the TV (Samsung smart TV logo appears). This is a brand new TV I got in December and I shouldn't have to restart the TV everytime I wanna power it back on. This happens regardless if the TV is off for 10 hours or 10 seconds.
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