My AC unit, which is about 8 years old or so (2200 sq ft house), kicked on yesterday and immediately two tv's went off and then came back on..yet a couple clocks that usually go out when the power goes off briefly stayed on. The AC still came on, but the unit outside started making a really loud noise...just a constant hum that was a lot louder than normal (I could hear it from inside the house when I usually cannot hear when its running). I turned off the breaker, looked inside and didn't see anything unusual, kicked it back on and when it turned on, everything was back to normal. Thoughts on what happened?