I have a buzzer that came pre-assembled. It has been working beautifully.
Today I plugged it, a 180 servo and an on-board LED into the same wave, and they all worked in unison for about 10 secs, then the buzzer stopeed working and hasn't worked since, while the other parts continued as normal, including the 180 which was plugged into the buzzer backpack.
I have tried different programs on different QBs, nothing gets it going. But on both of my bots, this buzzer backpack still works fine with the 180 servo motor.
I don't know which bots the now-dead buzzer has worked with before, but when it stopped working it was attached to an older QB.
Screenshot of the program, along with an amazing error (?) dialogue that popped up after the program had started executing and the bot was still plugged in