Emax are quite famous because of dead power supplies when shipped. If you are skill with electronics (Just only in case of! high voltage inside), check to resolder all the PSU transformer pins. Also, check as many solder points as you can. It is very common to find some of them broken (I experienced up to two emax that way after being shipped). Just my 5 cent.
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2011-07-29 by emax_dx5