I recently upgraded to H21-100 (with a new slimline dish) and I also have 2 D10-200's. I get searching for searching for satellite while changing channels (every channel) only on the H21-100, the D10's work fine. The signal strength looks good (all 80s-90s). I recently swapped out the H21 for this issue and the loss of the local channels (the locals just vanished both from the guide and direct tuning, even after every possible resets). The replacement fixed the local ch. issues but not the searching for sat. issue. Any ideas?