I was changing the channel and accidentally entered a number with a decimal point (80.7 instead of 807). Now the tv is in a mode and I cannot get it to change out of number with decimals in it. It won't go over 100.2 all the programming is infomercials and james bond movies. Just looking for the news.Our cable channels are 800 and above. I know the fix is probably easy, but can't figure it out.