It's quite odd. Channel 15 at my highschool is like possesed. Sometimes, it would just come on in the middle of the night. The wall controls would show the channel as off, but sure enough it was lit up. It would always be off by morning again. But, just recently, it decided not to go off. We were cleaning up after play practice one day, we just turned off the light board and channel 15 lit up. We turned the board back on and it showed no power going to it so we just packed everything away and expected it to be off by morning. Well it wasn't, and wasn't the day after, or the day after that. It was on for 5 days straight and never turned off. We finally turned the light board on, got the big ***** ladder out, and unplugged the light, then replugged it back in. It was off, so we turned on the channel on the light board. It turned on no problem. When we went to turn it off the board showed it as 00 but it looked as though it only backed down to about 70. We tried plugging the fixture into other channels and other fixtures into channel 15. We deduced that it was not the lamp, but the channel. Any ideas what would cause this, or what we could do to fix it?