Chill out for starters. Take off the back glass. Does the 5V led light up on the MPU (the big main board that has 3 little red leds on it). Sounds like there is no 5 volts if there is no sound and no inserts lighting up. Check the fuses on the power supply as well as the connectors going from the transformer. Its highly unlikely you fried the transformer.

PS please chill with the drama, make a more descriptive title. If you don't smell burning, see smoke or hear a pop you likely didn't screw anything up.

PPS If you own a Data East, just live with the hum.