I recently moved into a new house with the VIP 722k provided in the living room. The previous person had their tv hooked up through the coax and had his set to channel 73 with no issues. Now, with my tv set to 73, all I get is a fuzzy screen. I've tried setting the TV to "air" and "cable". Run a channel scan on each setting but I have still not gotten any video. My TV is a Sharp LC-32SB24U. Any input would be greatly appreciated. Thank you!