I enjoy a smoke now and again but this brand is harsh. My Carvin B1500 had been super reliable for several years, and then, I noticed a burning smell on stage. Well, really, I got through the show and the keyboard player told be about it after. So i was cleaning some connections up, getting dust out, and then plugged it in and the amp protect light came on, had some noise present when volume knob was turned, fan hit double time and smoke came out. I shut it down. I pulled the power module and see a songle sru-24vdc-sl-c that appears a little burnt but nothing else appears to be damaged. what is this part? is that my culprit or a symptom of a bigger issue?