I recently bought a 42 inch lcd from target. I have mediacom cable and a digital box with dvr service. I enjoy the hd channels but seems to be having some problems. I can't decide if it is the dvr or the tv. When I go back and forth between hd channels the screen comes on and then goes away and then black screen then top right hand corner says hdmi 3. It seems to have this pause almost everytime I do this. It always has done it int he past going from a non hd channel to a hd channel. 480 to 1080 assuming it has to reset the picture. Anyways I am looking for some help with any of this. Not sure where to start to find out what is the problem here. Thanks for any replies.