My 722 with Dish 1000.4 gets Error 004 on occasion when viewing locals. It clears when I switch to OTA. I have L618 downloaded. Sat 77 TP5 (Jacksonville locals) signal is 37. Sat 72 TP11 = 46, Sat 61.5 TP12 = 70. Are the 72 and 77 signals too low? I'm not certain if these are normal. If they aren't, I'll make sure the mast is plumb and skew is correct.