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PC dead any ideas?

Discussion in 'Hardware' started by michael78, Nov 28, 2006.

  1. michael78

    michael78 Terabyte Poster

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    God my week isn't going too well. I've bought a new Core Due 2 system and have built it myself. Now when I turn the PC on it switches on for 1 second then dies. I've tried everything and I'm stumped. I think it could be my new PSU. I've swapped the motherboard for a new one and it's still not working. I've got two 1GB Ram sticks and have tried them both and single in all the slots. I've tried with two different Hard Drives and with and without the CPU just to see if it posted. I've also tried the setup in and out of the case.

    Any ideas as I don't have parts to swap out as I'm an AMD man usually so the parts don't fit. Does this sound like a PSU failure?
     
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  2. Baba O'Riley

    Baba O'Riley Gigabyte Poster

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    Hi slypie, do you get any screen output or beep codes at all? What evidence is there of the PC powering up for a second? Does the fan spin up etc?
     
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  3. simongrahamuk
    Honorary Member

    simongrahamuk Hmmmmmmm?

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    Could be the PSU. Is it a new one? Are you sure its powerful enough?

    If not the PSU then I'd look at the CPU.
     
  4. hbroomhall

    hbroomhall Petabyte Poster Gold Member

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    It *could* be that the PSU isn't high enough power on one of the lines.

    The PC won't post without the CPU!

    One way to test is to remove all the drives, and fit an ordinary cheap low-power video card and then attempt the boot. Also try a small amount of memory.

    Does it beep on boot? Or doesn't it stay up long enough for that?

    Use a DVM on the important rails to make sure they are up to the correct values.

    Harry.
     
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  5. BosonMichael
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    BosonMichael Yottabyte Poster

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    Does the PSU work in another system?
     
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  6. r.h.lee

    r.h.lee Gigabyte Poster

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    slypie,

    Questions:
    • What make and model motherboard are you using?
    • What make and model CPU are using?
     
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  7. Mr.Cheeks

    Mr.Cheeks 1st ever Gold Member! Gold Member

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    er- did i just read this?

    edit: yep - double post.
     
  8. michael78

    michael78 Terabyte Poster

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    sorry guys should of mentioned it's a new 700w Jeantech PSU. The only things it could be IMHO is the PSU or the CPU which is a Core Duo 2 E6600. I've also tried the PSU in a 20 pin motherboard mine is 24 pin so it doesn't rule out that using the extra 4 pins are faulty.
     
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  9. phonics3k

    phonics3k Nibble Poster

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    Well when one of my PC's did this it was because the CPU fan stopped working and it would turn itself off because it was going over the threshold, not saying that is the problem but it could be.
     
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  10. BosonMichael
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    BosonMichael Yottabyte Poster

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    Technically, it could also be the motherboard.
     
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  11. Bluerinse
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    Bluerinse Exabyte Poster

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    He said he tried another mobo.

    Have you tried disconnecting everything that's not essential, any extra cards like NICs, modems. Also, without the hard drive, optical drives - just the PSU, mobo, cpu and video?

    700 Watts is ample power I am sure but there is a good chance that it is a faulty new PSU. CPU's rarely give a symptom of a comletely dead PC. However, it looks like it's one or the other, and my monies on the PSU!
     
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  12. BosonMichael
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    BosonMichael Yottabyte Poster

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    Sorry - I'll try to get my money back on my LASIK surgery. ;) heh!
     
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  13. Bluerinse
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    Bluerinse Exabyte Poster

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    Yep, looks like they saw you coming and stitched you up like a kipper :p

    [Note: mod action, merged duplicate threads]
     
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  14. sebstah

    sebstah Nibble Poster

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    i go with what blue rinse said, unplug everything but the Vid card and KB. maybe also check the placing of the ram on the mobo some mobo's can get a bit picky if not in the right slots. reset the bios even.
     
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  15. michael78

    michael78 Terabyte Poster

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    I think it's just been bad luck and is my PSU thats at fault. I probably shouldn't of done it but I plugged my 20 pin spare PSU into the 24 pin socket and switched it on and it worked. The strange thing is I plugged my 24 pin PSU into my old PC only using the first 20 pins and that worked. So it must be the extra 4 pins that are faulty or the 8 pin power lead that my new motherboard needs...:rolleyes:

    Anyway guys cheers for all the help it's really helped me figure this out.
     
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