I have a Samsung UN40MU6290FXZA TV. It has been losing channels. They disappear from the channel list. I am not talking about a no signal condition, they simply are gone from the list of channels. I tried to us the remote to access the channel with the number buttons, no success. Another TV in the house does show the channels that were lost on the Samsung TV. I rescanned the channels and they reappeared in the channel list. After about a half hour of watching they disappeared again, but still available on my other TV. Any help or direction would be appreciated. Thank You.