As you described the box is dead which means no power. Could you please clarify again about the fault. There are two types of faults i.e software related and hardware related. Are you getting any sort of display? If not the box is electrically dead in that case you have to look into the Power supply section. If you have got some kind of display still there that means your box is ok electrically and therefore you have software related fault. If, however there is a fault in the power supply there is lot of info available on the net to repair Humax power supply.