Help with the box superus, goes off

[fawadak]

I bought two receivers, from someone online, it was working for the first day, after that, it has stopped working now,both of them, the problem is when I switch it on, its trying to get on, but goes off and off again, if I try a lot it will work for few minutes than again goes off, I really don?t know what to do, now, is there any one can help me, what I should do with it. I asked the seller he said, its has only one months warranty, but he told me its new, they were in new boxes I don?t know either was new or old, its look new by the way, its has this info. Sorry c500/ 1.12/ b_11

Aug 04/09

Thanks