Do you have an antenna connected? Is the antenna cable faulty? Eliminate this by substituting another cable. Is the antenna wall outlet faulty? Is the antenna damaged (recent storm perhaps)?
For firmware I suggest that you try one of the manufacturer's websites.
A SEARCH such as might be useful.
I don't know which part of the world you live in (Austech membership is not confined to Australia), but if UK., Spain or Italy go to .
Otherwise try other links returned by the search (above).
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