Most probably your Dreambox DM500HD has a Japhar Sim, open it and check, it could be v3 Japhar, but you can upgrade it easily via the Japhar Addon Manager in the image to the v6, if the tuners after installation doesn't work or you have no boot screen (Stays black).

Link : http://www.ourdreambox.com/ubbthreads.php?ubb=showflat&Number=2680#Post2680

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