I recently purchased a used 2014 ED (still has about 10 months of factory warranty left) and every once in awhile it will make a loud click. It's very similar to a clicking problem we had a work recently with too many electronics on the same circuit. When the printer would come out of sleep mode to print, the UPS battery backup would click and sometimes the computer would surge. When we moved the printer to a different outlet that was on a different circuit breaker the clicking went away. The clicking in the smart seems to happen more often if I have the AC and radio on. Like it's just too much electricity. Should I be worried? Do others have this problem? Is it even a problem? Or am I just being neurotic?