Swapped my old quad lnb to an octo to get some more feeds for freesat receivers in other rooms. Problem is while I have all the freesat channels my Sky channels are not showing. It keeps telling me my Sky+ HD box is not receiving a signal when I select a Sky channel. The lnb is set to position 2 on the mount, the signal strength and quality is about 50% on both inputs. Is it possible the dish has slipped out of alignment, the f types need replaced due to age deterioration (been up a lot of years), the lnb is not correct (it receives freesat HD ok) or a combination of all these!