Berkeley CSUA MOTD:Entry 38429
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2017/09/24 [General] UID:1000 Activity:popular
9/24    

2005/7/6-8 [Science, Politics, Science/Electric] UID:38429 Activity:nil
7/5     When I unplug my Uninterruptible Power Supply to simulate power
        outage, it makes this light buzzing sound. Is this normal with UPS?
        \_ it sure is.  UPS is letting you know normal power flow has
           been interrupted, please fix!
        \_ I'd guess this is the result of DC power being converted to AC.
2017/09/24 [General] UID:1000 Activity:popular
9/24    

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