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my tv comes up with a no signal message when i turn it on, i have to to do a total reset to get it to work, all is then fine until i turn it off, then have to to do it all over again next time i turn it on

@paulineholt, Pauline, If you have setup your TV as per your TV’s manual, perhaps some how the TV is set to Demo/shop/store mode, if in this mode will not retain your set up. See links below for instruction on removing demo/store mode. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. http://support-us.samsung.com/cyber/popuhttp://support-us.samsung.com/cyber/popu