My mate did a Diy Free sat fit using an existing dish / lnb, it worked ok for a month, now doesnt. First some channels droped out, following a reboot it's all packed in. Although his box presents as working (2nd hand, could have developed a fault), the signal strength shows 70%, it shows no signal quality 0%. There's no reason to expect the cable (external damage) or dish movement (possible, but no reason why). Can anyone pinpoint a likely fault. I suspect the Lnb, but is this how they fail?