Hi Group, can someone help please? Im working on a Vizio led tv, D43-C1 Power Supply / LED Board 715g6973 p02-002-00h. when testing the output pins to main logic board with dmm, i get 5v on stby, 18v on 6 pins that the legend aks for 12v, when i disconnect the harness to the main board, i get zero volts on stby and 18v on the 12v pins.. when testin the k18a60v mosfet Q9102, on the drain pin I get 18v dc.. should i change the power supply board or the mosfet..?