Hi m8
I`m owner of dm500HD &Samsung led UE40ES7000 also have same issue like others guys hire
in jul 2012 i change one DM500HD with HDMI problems or black screen yesterday second box not working on my TV
but working on nachbar LG-TV
I flash new image, new cabels etc noting happend but with scart DM500HD working in SD format like nothing hapend
I will try to make log & send it hire,what further ..