Sounds funny. Has your dish been bumped? If not, then I don't think it needs to be realigned. Unfortunately I'm too far to come out there and do it but it might be any number of things. Actually though if it does need to be realigned it will be cheaper to diy. Get yourself a Satfinder (you can get one for about R200) and follow instructions found on the pamphlet. And then if something happens again you can diy again. Seriously though, If the dish has not been bumped then it won't need to be realigned. Have you checked cabling. If your cables are running in the roof they could have been damaged by rats. (have seen this) And are you sure it is not the lnb, they don't usually malfunction but it can happen.