I have this source of an LCD TV which stayed in Standby, but now it oscillates and begins to work only that the secondary voltages are raising them in the 24V sends 48v, in the 12V sends 24V and in the 5V sends 7.8V. The chopper transformer begins to make a hum and the primary MOSFET the main one starts to overheat. The primary of the chopper transfomador reaches 168v. At first, the humming towards the transformer was slower and the voltages were delivered correctly but began to decrease and the voltages were going to 0V. This happens only when I turn on the source.