Hello, I resently bought 2 D12-500 receivers at a yard sell (if they are leased I probably can't use them). However my plan was to remove the AC-DC power inverter board and run it off a 12V car or UPS battery should I want to watch TV if my power failed. I discovered upon opening the unit however the board runs on THREE different DC voltages. 12V at .6 A 1.1 A for a min (boot up likely), 6V 1 A and 3.3 V at 1.3 A. Now my question is do I need to get a power supply for EACH voltage? I.E 6V for the 6V, 4V for the 3.3 and straight 12V for the 12V? Or can I just run the 12V only? Thanks guys!