Just purchased a Samsung UM32D4000 LCD TV and get a "weak or no signal" caption on the TV. I am using a Dish VIP 722 receiver. My old 32 inch CRT TV works well, but I cannot get a signal on the new LED TV. Is there a signal booster that I can install betwen the receiver and the TV that will allow me to obtain a signal? I tried a Radio Shack powered signal booster without any results. Just curious if the more expensive units would work. Any halp appreciated.