Not really useful, but it may useful if you have some sort of trouble with the Lnb input. For example a burned part. But this box is just released, so I assume there is still warranty on your dm520hd box. So, I advice not to try to fix it when there is warranty on the box. Nevertheless I have made a microscopic view inside the Lnb input box and like to share it. Just because it can, and it could be handy in the future. It's huge when you click on it, so beware. ;o)
