Having just installed HH6 with Infinity, I am on my second new hub as first one was apparently faulty. Problem is pixellation on new channels,particularly BT Sport, plus picture "dropping out" briefly, plus IPC 6032. On previous HH3 (?), used Power adaptors- white Arcnet- I notice more recent ones are black. Could this be problem or have I got another dodgy HH6 or is this piece of kit not as robust as implied?