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Thread: Pc build not powering on. Help Please

  1. #1
    tkh
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    Pc build not powering on. Help Please

    Just building a new computer for my grandad, it composes of:
    Intel 4400 Core2Duo CPU Retail
    Gbyte GA-965QM-DS2 Mobo
    Corsair DDR2 TWINX 2GB PC6400
    430W SEASONIC S12-430

    Whenever I go to power it on, the fans spin for half a second, the power led lights up but then everything goes dead. Ive tried reseating the ram, reseating the cpu. Im out of ideas. Any help at all would be appretiated.

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    checked that there's nothing shorting out the motherboard?
    Iain M

    "Sleep All Day, Party All Night
    Never Grow Old, And Never Die"

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    Flat cap, Whippets, Cave. Clunk's Avatar
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    A couple of possibles are..

    The Seasonic doesnt like the Gigabyte board.

    or

    The board needs a bios update to see that cpu.

    or

    There is a short somewhere.

    or

    Try a different graphics card if possible.

    or

    Could be the board that is broke, but the PSU thing would be my first line of investigation.
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  4. #4
    SiM
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    • SiM's system
      • Motherboard:
      • P5K Premium
      • CPU:
      • Q6600
      • Memory:
      • 8GB PC2-6400 OCZ ReaperX + Platinum
      • Storage:
      • 3 x 320gb HD322HJ single platter in Raid 0
      • Graphics card(s):
      • PNY GTX285
      • PSU:
      • Corsair TX650W
      • Case:
      • Antec 1200
      • Monitor(s):
      • 2407-HC
    I had that same problem before, twice - turned out that the early MSI neo2 platinum 939 motherboards like to kill themselves when put in the same case as an antec psu... Not sure why, the antec psu never made anything else die... The replacement MSI died in the same way too... I had to get a refund and buy the only other 939 board out at that time - the gigabyte one...

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    • ukengineer's system
      • Motherboard:
      • ASUS A8N-SLi DELUXE
      • CPU:
      • AMD 4600 X2 S939 @ 2.8Ghz
      • Memory:
      • 2GB GEIL ULTRA PLATINUM DUAL CHANNEL DDR PC3500
      • Storage:
      • 1.2TB OVER 4 FAST SATA DRIVES
      • Graphics card(s):
      • ATi X1950XTX GDDR4 512MB
      • PSU:
      • Mesh
      • Case:
      • Mesh MatriX
      • Monitor(s):
      • 19" DVi LCD 6ms
      • Internet:
      • 20Mbit Blueyonder/Telewest now Virgin
    You connected the 4 pin power lead to the motherboard, normally near the cpu.

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    tkh
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    Yeah it seems to be that the psu isn't working with the motherboard, I havn't got another psu to try as im working on a laptop, but I have managed to get it to start once by moving the psu into a different position

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    Senior Member mcmiller's Avatar
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    Quote Originally Posted by tkh View Post
    Yeah it seems to be that the psu isn't working with the motherboard, I havn't got another psu to try as im working on a laptop, but I have managed to get it to start once by moving the psu into a different position
    sounds like some sort of grounding issue, take the motherboard out of the case and try it

  8. #8
    tkh
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    yeah the motherboard was always out of the case.

  9. #9
    Pedandic mo-fo IAmATeaf's Avatar
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    • IAmATeaf's system
      • Motherboard:
      • Asus P5Q Deluxe
      • CPU:
      • Q6600@3.25
      • Memory:
      • 4 x 2GB Corsair 6400C5DHX XMS2
      • Storage:
      • 2 x 0.5TB 7200.12, 2 x 1.5TB 7200.11
      • Graphics card(s):
      • Gigabyte GTX460 OC
      • PSU:
      • Corsair HX520
      • Case:
      • Lian Li PC6089B
      • Operating System:
      • Windows 7 Pro x64
      • Monitor(s):
      • Samsung T240 24"
      • Internet:
      • 6Mb ADSL Max
    Could be a loose PSU to mobo power connector, try wiggling it around and if it boots then remove and inspect the connector.

  10. #10
    Flat cap, Whippets, Cave. Clunk's Avatar
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    Some S12 PSUs have a problem at startup with some motherboards, usually Asus, so it does make sense. Good luck with the new PSU.
    Quote Originally Posted by Blitzen View Post
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  11. #11
    ERROR
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    I've had this happen to a couple of my builds in the past, I had extra components lying around so I just played around until I outlined the cause, which in my case was the mobo, but it can be just as easily the fault of the PSU.
    DX486 | 4MB RAM | 300MB HDD | 500KB Shared Graphics |

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