Joined Oct 2008 Professional Novice
APC Battery Backup makes loud high pitched noise all of a sudden
March 2, 2013 at 02:07 PM
This has happened multiple times. I'm watching TV and all of a sudden the APC unit will make this constant, loud, high-pitched noise. Nothing turns off as if the unit failed or something but the noise is unbearable. I turn off my TV and HTPC and then turn off the APC unit for about a minute, turn it back on, and the noise is gone. It isn't really that frequent but has happened at least three times. What is the issue?
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