This weekend I noticed that many of my Directv channels would not come in. So I jumped over the signal meter and see that my signal strength is around 55 on all 3 satellites. When I installed this oval dish last fall I was getting mid to upper 80's on all 3 satellites. My first thought was maybe the dish need to be re-aligned. So I tweaked it a bit, but no change in signal strength. My second thought was a bad piece of cable so I temporarily replaced the cable run from the dish to the receiver, no change in signal strength. So I figure at this point it's either the LNB or the receiver. Has anyone else experienced this before? I'm leaning toward the receiver being the problem since it's about 4 years old and the dish is less than 1 year old.