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Old 08-14-2012, 11:55 AM   #18
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Join Date: Jul 2007
City & State: East Coast, USA
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Default Re: Need tips in fixing APC 1500VA UPS having buzzing noise

Did you replace the (orange) poly cap next to it? They are wired in parallel. The poly cap should be around 2F in value. Together you get ~22F.

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