Good afternoon friends, I am electronic, without experience in repairing televisores.Mi TV by variation of voltage AC was defeated the Mosfet Q101 and two resistors of low value. I changed the mosfet for one of the same characteristics (not original) and the resistors, the result is that the 12 volts are not present and the other voltages are not stable, the question is is the instability is due to SW regulator SC1S311A? This happens without connecting the source card to the mainboard. Thanks, regards!