I have a dish with two LNBs that I use to watch 2 different satellites. Sometime ago, a worker hit the dish and bent the bar that holds the second lnb. I tried to realign the lnb but it wouldn't work, the lnb is ok since I swapped it with the main lnb and it still works. I tried sliding the lnb back and forth on the bar but there is never any sign of a signal. How does one go about aligning the second lnb?