Computer shut itself off - just one time

Discussion in 'Computer Help' started by Salamander, Sep 17, 2012.

  1. Salamander

    Salamander Member

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    Four days ago I was on my computer (its a dyi - about mobo, hsf, and psu about 5 years old, other components are newer) when it suddenly shut down. I then pushed the power button and nothing happened. I unplugged it, tried to turn it on and again nothing happened. I then tried a third time and it booted up fine. CPUID show temps are all fine.

    It's never done this before, and so far if hasn't done it again.

    Any ideas why it happened?
     
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  3. MagnusTheBrewer

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  4. paul878

    paul878 Senior member

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    check for leaky capacitors.
     
  5. denis280

    denis280 Diamond Member

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    and also for loose wires
     
  6. AnonymouseUser

    AnonymouseUser Diamond Member

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    PSU may have overheated which would explain why it took a few tries to turn on.
     
  7. Salamander

    Salamander Member

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    Another day, still ok. Didn't see any loose wires or leaky capacitors. Use canned air - a very small bit of dust.
     
  8. Salamander

    Salamander Member

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    A few weeks ago it started again. Now it will stay on for about two hours, then shut down. Yesterday my burner stopped working, though Plex Utilities can find it. Today my DisplayPort connection stopped, and I had to connect the graphics card with the DVI connection. Temps seem fine. I don't know if it is the PSU, the mobo, or something else. Any thoughts?
     
  9. VirtualLarry

    VirtualLarry Lifer

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    start with swapping in a known-good psu, and pray that the old psu didn't permanently damage anything.
     
  10. Salamander

    Salamander Member

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    Actually, I'm getting ready to do a new build - hoping to use some of the parts. Is there any way to tell if there is permanent damage to the burner and diswplay port connection prior to installing them in the new build?
     
  11. Salamander

    Salamander Member

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    Ok, after I pulled out the harddrive without the OS and pulled out the soundcard, the computer is fine. It's been running for 36 hours straight without any issues. What gives?
     
  12. AnonymouseUser

    AnonymouseUser Diamond Member

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    It still could be a failing PSU, so now that you've removed some of the load it works better. A long shot could be the SATA cable you were using with the secondary hard drive.
     
  13. mlc

    mlc Senior member

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    PSU or a bad cable/connection are most probable ... as last poster said.. the SATA cable could be bad...
    1) try reinstalling the drive using a different cable... and try it in a different SATA port to rule that out
    2) if no issue.. then reintroduct the sound card as well.. as that could be causing problems if not seated correctly

    Other possiblility could be a short/bad mount between the motherboard and case.. and when you wiggled out the sound card.. it may have temporarily alleviated the problem.. .

    If none of those work.. then psu is a possibility.. but any hardware/wire connecting into the board could cause this behaivor as well... so make sure connections are snug, etc..