HARDWARE
Why is this $thing not working?
In todays episode of “why is this $thing not working?”
This access point won’t power up. I shook it and heard an odd sound.. 
Custard? 
That’s nasty. And so ends the life of an access point. 
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I’ve also seen this happen on some of our 7731s. Sometimes birds like to chew off the little breather device on the top of the AP. I found that after leaving the radio to dry for a week it came back to life!