After a year away i'm going back to sky on a deal, the week before my last contract finished my box developed a fault which i never got anyone to look at and its still present now. I have a tompson box model 902020 version 4e3004 basically on a lot of channels i get a message saying no sat signal being received even tho 2 mins previous it was there. on checking settings-signal, input 1 strength/quality is sometimes there but input 2 isn't, the box is also quite noisey. so 1 Is my box slowly dying? 2 Is there anything i can try before the engineer comes tomorrow ? thanks alot