LG 37LC7D

Unit is about 3 months old. It started to flash the setup screen on and off fast then the setup screen stays there about one or two min. then goes away, then comes back and starts the cycle over again. During this time the remote will not work and the only way to turn off unit is to push on off button on side of tv. This happens every day and all I can do is view the program with this on the screen, and only view the channel that it was on when it started. Sometimes I get lucky and go the whole evening without this happening, but this is getting to me, thinking about hammer :)