I just got an LCD TV (Magnavox 15MF050V/17) but it doesn't have a power cable. Looking around, I've found a 12V/2.5 or 2 A (can't remember for sure) universal power adapter. Will this work for me? The label on the back of the TV says 12 volts and a max of 3A. Also if you happen to know the model and where to get the actual power supply or a 12V/3A power supply for a reasonably cheap price and reliable seller, I would welcome that info as well.