I have a similar situation....I have had a several problems and I believe it is related to my receiver. I've had a Hughes for 7 years or so and had never had a problem until I bought a 2nd receiver (DirecTV w/Tivo) and changed from a single LNB to a dual LNB. What I currently get is occassionally it will come up with the same blue box saying searching for signal on sat. 1 or sat. 2 (I have not paid attention, but I believe I've seen it say both). If I go to test the signal strength and go back it disappears. It seems to do it after I to certain channels. I have my original Hughes receiver on one line from the LNB and the other to a multiswitch with 2 lines going from that to my Tivo. Now, when I get the blue box the Hughes receiver was fine; however, before I got the multiswitch I would get the searching for signal on BOTH receivers. It would be very intermittent -- in fact I had a lot of problems with it and then it went away for about 2 months then started again. I put the single LNB back on and it (only attached to the TiVo) and still had problems so I don't believe it's the LNB. One other strange thing -- when I first got my new receiver and dual LNB I could not get anything, until hours of messing with it and it came on simply by pulling on one of the cables. I know, you'll say it's probably corrrosion or connection issue, but I don't believe that's the case because if so I would have some issue with the Hughes and I have not when it is on its own cable -- either one.