I suspect either a controller failure, or a failure of the electronics that drive the high intensity LEDs. I believe they switched from Xenon strobes to LED a few years ago. Bearing in mind that two 50 kW stations (CFZM 740 and CJBC 860) are feeding the same tower, there are very high voltages at certain points on the tower. I know of one strobe manufacturer that refuses to supply for high power installations because of the high probability of eventual failure.