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344 posts

Ultimate Geek

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#86407 6-Jul-2011 08:08
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Hi there

My pc power supply when attached to a tester shows no -5v led.

I expect this means it is toast. Is this correct? Also, What does that particular output (or whatever) control?

Thanks in advance for any replies.


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5444 posts

Uber Geek


  #489907 6-Jul-2011 08:23
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The -5V supply is obsolete, you should only need it with old equipment. It has been optional in power supplies since 2003.

EDIT I see that some MB with onboard speaker amplifiers used -5v even after it was optional for PSU to include it. Left hand/right hand.


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344 posts

Ultimate Geek

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  #489912 6-Jul-2011 08:37
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I was testing it as the system does not get to post even. Just the fans spin & hdd lights come on. No display whatsoever. No RAM beeps occur.

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Ultimate Geek

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  #490163 6-Jul-2011 17:07
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dead mobo/bios


344 posts

Ultimate Geek

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  #490165 6-Jul-2011 17:12
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Yes. Have arrived at that conclusion too. Seems my Asus P5q pro turbo has popped it's clogs.

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