Sounds like you have a bad part on the monitor and not the cable hack you created. The signal wires coming in only have 1-5 volts of juice and very few amps, so unless you hooked your RGB to a power bar somewhere i doubt thats what it was. When my Wg 7193 was blowing fuses, it was a bad flyback. check out randy fromm's flowchart for your monitor and see where he recommends starting and go from there.