Humax ND 1000 C set top box
There is likely a serial interface somewhere on the PCB itself, maybe even a header. Open the sucker up and look for suspicious 2-6-pin connections. You may be able to get a part number off of the main micro -- look up the datasheet for its JTAG, ISP, 1-Wire or other programming pins. There's always the possibility that this thing was programmed before being soldered in, but there should still be some kind of test rig setup to interface with it -- with a bit of luck and ingenuity, you may be able to hack even that into a programmer.