Since the last weekend I've noticed frame skips on both of my Hd-Dvr's (HR24 & HR22) on the following channels: 509 (HBOZHD), 530 (SBLKHD), & 552 (SHWMHD). So, I had a Tech come out yesterday and check all end connections at the Grounding Block and at the dish and also had him replace the LNB...