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PC not POST - Phase LEDs blink once then nothing

Recently moved my PC out of an old case and into a new one, replugged everything as usual and attempted to start up but nothing happened. The four Phase LED's on the motherboard flash once but neither the fan on the PSU or on the motherboard spin up and there is no further activity. I've unplugged and removed my HD's & video card and tried troubleshoot that way but am getting the same result. Any suggestions? I'm guessing it's a PSU issue but I've no way of testing that without purchasing a new one.

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  • hugh Nov 14, 2012

    So I've managed to get some form of boot - it looks like the PC is booting normally but after about three minutes it shuts down again. Any suggestions?

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  • 2,878 Answers

Try testing with a voltmeter. They are common, cheap, and you may even have one. Or, at least be able to borrow one.

Posted on Nov 09, 2012

  • hugh Nov 14, 2012

    So I've managed to get some form of boot - it looks like the PC is booting normally but after about three minutes it shuts down again. Any suggestions?

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SOURCE: MSI K8N NEO2 Platinum NOT Posting + No beep + No display

try to test the CPU on another machine ...

or at least remove it and reinsert it.

But if u say that u reseted the BIOS an it still not doing the post, it just could be that the motherboard is out !

It can also be the PSU as u say, but i doubd it ! Try to remove all hard drives, cdroms, etc... to limit the power usage... and see if it passes the post.

U can also try to remove the motherboard from the computer case and put it on an insolating surface and than try to boot (sometimes shorts appeare betwen the motherbord- case - psu)

Posted on Jan 08, 2009

  • 17 Answers

SOURCE: Abit AN7 motherboard does not boot - POST code AF

I think is a bios problem, a ram failiure would be C1 post code.If the bios is corrupted, try a blind bios update or if it doesn't want to, you must do a hot flash update.For more details google search for award bios hot flash.Or dump it and buy a new one.Usually when the post doesn't change at all or if it stops to 90 is a bios problem.I had a similar problem, mine hang at 90-after a complete check of uguru.In your case might also be the uguru chip.I hot flashed the bios.I used an abit nf7s 2.0 to start and then put in my bios.It worked and i also made a backup.Your chip is Winbond-4 mb capacity.

Posted on Jul 11, 2009

  • 10 Answers

SOURCE: No onboard video with my new MCP6P M2+ mainboard

Try removing the bios battery for 30 seconds then boot the pc, this will clear the bios. Maybe the bios was misconfigured. Else you can jump the "clear cmos" pins on your motherboard, same affect as removing the battery. If that doesn't work try different ram, it's possible the ram is not compatible. Sounds plausible being that there were no post beeps. Good luck.

Posted on Sep 14, 2009

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leave the battery main out.
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are you going to run the COIN cell RTC battery for 10 more years.
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http://h10032.www1.hp.com/ctg/Manual/c01918142


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  • old PC have many points of failure (endless it seems)
  • does the fan run? is it packed in lint, as all are this old.?
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HP caps lock POST blink code page is a horror of horrors
no 2008 listing, to name one flaw (2011 and newer sadly)

https://support.hp.com/us-en/product/hp-pavilion-dv7-1100-entertainment-notebook-pc-series/3756677/model/3807256/document/c01732674



here is a old post at HP, one guy 3 year ago said

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CPU not functional
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Memory
Module error not functional
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Graphics
Graphics controller not functional
LEDs blink 5 times (or RTC dead)
System board
General system board failure
LEDs blink 6 times (or RTC battery dead)
BIOS
BIOS authentication failure

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