Hi there

If the TV works fine in a normal power socket but not with a HDP750G- this indicates to me that there is something not quite right with the HDP750G.  Suggest you try a different type of power board.  I bought this in 2011 and its as reliable as an atomic clock:

http://www.amazon.co.uk/Belkin-Isolator-Cinema-Protector-Sockets/dp/B0002AG9SA

Cheers