I have an Alesis M1 Mk2 set of speakers. One stopped working. The blue LED blinks slowly, and every time it comes on, the woofer moves out and back in. I tried the power supply from the other unit and it doesn't work either. The power supply from the bad unit works fine with the good speaker too, so the problem is something with the crossover, not the capacitor problem that everyone knows about.

Audio Players & Recorders - Alesis - M1-Active-MK2 Powered Studio Monitors -Pair System