my household voltage is 120-125.....If I disconnect the picture tubes it will stay on. ....I disconnected it from the thing that looks like a ignition coil. Makes a nice spark when you discharge it to chasis....anyway...something is making a humming noise before it shuts off and the only way to get it to come back on is to unplug it then plug it back in. does anyone have any suggestions to what it might be and how much it should cost to repair...Im trying to to get ripped off when I get it repaired...or maybe get the parts and do it myself...

thanks