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Power supply test

Last answer on Sep 14, 2008 9:25:49 pm BST seaotter, on Sep 14, 2008 7:44:38 pm BST 
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Hello,
I have a Antec true 550 /EPS12V power supply. I tested my power supply with an Ultra tester and when I attach the 24 pin plug into the tester I get no -5V and no PG light and it keeps beeping. what could be the problem with this power supply. All the fans go on and it seems to be working OK.

Configuration: Windows XP PRO, ASUS P5B-E socket 775, 2GB memory/DDR2 667, Pentium 4 3.0 GHZ,ATI 7600 256mb.
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 abuthasni, on Sep 14, 2008 9:25:49 pm BST

Connect with a cable in to red and black pins

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