Today was my first day to shoot with brand new pair of YN-560IIIs, and a YN-560TX. I had a large session with clients today and the YN-560IIIs performed amazingly. However I went on a dinner break and when I came back to do my next session, I got a handful of shots in and one of my YN-560s began to fire at full power. I checked the 560-TX and it showed the correct setting I was shooting at for each flash, and then I checked the speed light that was firing full power and it was showing 1/64th correctly, but firing 1/1. I power cycled, changed batteries, manually set power, and moved it to a different group but nothing would get it back to firing anything but 1/1. Is it possible that it has gone bad on me? Is there a reset button hidden somewhere? Any help would be greatly appreciated!