I posted this over at the Fender forum as well, but maybe someone here can also offer a suggestion: Attempting to adjust the bias in my brand new Supersonic, I smoked the R140 resistor resulting in blowing the amp fuse. I couldn't find my bias probe so I stupidly attempted to do it with my multimeter. I had the black probe to chassis ground and just touched the resistor resulting in a reading of 26.8mA There was a quick flash of light and that was it.....what went wrong? The entire resistor didn't burn, just the end grayed a little bit. Will that need to be replaced as well? Thanks for any ideas!