Computer won't boot

Discussion in 'General Hardware' started by Aforizm91, Sep 18, 2017.

  1. Aforizm91

    Aforizm91 New Member

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    Hey guys, I'd like you to help me with a question I'm having about my PC.

    A few days ago I was on Youtube, the PC (described below) turned off out of nowhere, I tried to turn it on back but shutdown in 5 seconds. I tried to turn on again, but now the CPU_LED is stuck and I can not POST or even enter BIOS!

    PC Description:
    CPU: i7 870 STOCK
    Mobo: ASUS P7H57D-V EVO
    RAM: Corsair 2x4GB 1333mhz
    Source: XFX 550W PRO Core Edition
    VGA: GTX 760

    Here's what I've done:
    -Reset BIOS either by removing the battery or by moving the jumpers
    -I tried my PSU on another PC, and it works perfectly
    -Booting the PC without memory = According to the manual, it should beep, but it didn't.
    -I tried my memories on another PC, it works.
    -I checked CPU and still warm up, dunno if it's related

    The most curious is that, if I turn the PC on without the 8-pin connector on the processor, the PC turns on, the LED light on the CPU goes off, but the PC shuts off shortly thereafter. If I boot PC with the 8-pin connector, it gets CPU_LED on, but if I keep the 8-pin connector and take out the CPU, it's still the same, almost as if the processor was never there at all.

    The manual says that if you connect the mobo without the memories, the PC should beep, but it didn't. In other forums that I researched, turning computer ON with no CPU nothing happens, does not POST (obvious) but also does not generate beep or anything, even if everything is OK.


    So, what might have died? Processor or motherboard? Has anyone went to something crazy like this?
     
  2. sverek

    sverek Ancient Guru

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    I guess you already tried booting without GPU, any drives and USB attached?
    The only other check I can think of is visually inspecting motherboard and CPU and see if there any damage.

    Since either motherboard or CPU went bad, It would be safer to replace both. If motherboard is faulty and you try to set working CPU, it might damage it.
     
  3. airbud7

    airbud7 Ancient Guru

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    Bad mobo...I would bet anything that i7 is still good.
     
  4. Mufflore

    Mufflore Ancient Guru

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    Check you have a 4 pin loudspeaker plugged to the connector block that your power switch and reset connect to.
    Without that speaker plugged in it wont beep.

    Some motherboards come with the small speaker in the box.
    Some cases come with the speaker.
     

  5. TheDeeGee

    TheDeeGee Ancient Guru

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    If you can't physicly see anything wrong with motherboard i suspect it's CPU.

    What you can still try is taking everything out of the case and try booting it on a cardboard box... to rule out a possible shortout within the case itself (standoffs).

    If that doesn't matter then it's looking pretty grim. To know it's CPU the only way is to try it in a different motherboard... but finding such an old board is tough.

    A last resort fix would be baking the motherboard. Since it's quite old there could be a cracked solder point. But this is really the last thing you want to attempt.
     
    Last edited: Sep 20, 2017
  6. Hammie

    Hammie Banned

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    Your CPU is fine.but DeeGee might be right. Hopefully its the PSU which is easiest thing to replace. gl
     
  7. sverek

    sverek Ancient Guru

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    He said nothing about PSU.

    Read OP:
     
  8. Extraordinary

    Extraordinary Ancient Guru

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    My brothers X99 board fried his i7 CPU a few weeks back and the CPU_LED error light was stuck on too
     
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  9. airbud7

    airbud7 Ancient Guru

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    Ouch...that hurt.
     
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  10. AsiJu

    AsiJu Ancient Guru

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    Like said big chance both CPU and mobo should be replaced. You wouldn't find replacements for either anymore anyway except second hand.

    The system just reached the end of its lifespan I suppose.
     

  11. Mufflore

    Mufflore Ancient Guru

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    The op may have done a bunk.
    He hasnt responded, only that 1 post since he joined.
     
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  12. airbud7

    airbud7 Ancient Guru

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    Yea^....young bucks in a hurry.....they will slow down over time...
     

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