Computer switched itself off during boot after 15 seconds, seems to be working fine now...

Hey guys,

I hope you're all well and can give me some direction with this!

Before I begin please find my comp specs below.
So this morning I go to switch my computer on, it begins the boot process and after about 15/20 seconds, just switches off. Completely. I try booting up again 2 more times to be faced with the same issue, it begins to boot up and is displaying the boot process, then after about 15/20 seconds, switched itself off yet again!

It was at this point I decided to adopt my old mans rule (albeit a myth) of leave it 30 minutes and it will have fixed itself! Complete hokum! However after the 30 minutes, I come back, switch my computer on and boom! It's working. However I'm not convinced.

So I know when it comes to this kind of stuff it can be a few things like the mb, PSU, RAM etc. etc. However I've never had anything like this happen before so don't even know where to begin diagnosing this!

So as I said, the boot begins and is displaying, then after 15/20 seconds it switches off! And I can't for the life of me remember what part of the boot it was switching off at! It hangs on a particular screen for about 3/4 seconds, one that it usually blasts past in about a millisecond usually. (If I hit the problem again I'll make a note).

So does anyone know how I could diagnose this and how I can prevent the problem form happening again in the future?

Kind Regards!

- FermitTheKrog


Specs:
Mobo - Asus Crosshair V Formula Z
CPU - FX 8350
Cooler - Corsair Hydro Series H80i
GPU - GTX 780
PSU - Corsair AX860
RAM - 4 x 4GB Kingston DDR3
HDD - 1TB SATA
All inside an Aerocool XPredator
9 answers Last reply
More about computer switched boot seconds working fine
  1. Check the fan filters on the computer case, specifically the psu filter.

    That problem usually occurs with a overheating psu or any other components
  2. Overheating on your CPU is the most likely factor, either because of failed cooling / pump / fan or inadequate contact with heatsink / too much dust.

    Failing PSU is another potential culprit. Definitely check your cooling first. Does it even turn on?
  3. herrwizo said:
    Does it even turn on?

    Look,

    Anonymous said:

    So this morning I go to switch my computer on, it begins the boot process and after about 15/20 seconds, just switches off. Completely. I try booting up again 2 more times to be faced with the same issue, it begins to boot up and is displaying the boot process, then after about 15/20 seconds, switched itself off yet again!

    It was at this point I decided to adopt my old mans rule (albeit a myth) of leave it 30 minutes and it will have fixed itself! Complete hokum! However after the 30 minutes, I come back, switch my computer on and boom! It's working. However I'm not convinced.




    You could look at the psu,i've had personally an AX 760 which would not work with my Asus Z77 motherboard,would sometimes give start problems with a rail out of spec warning.It does work fine in another rig and the Asus board works fine with another psu.
    Could also be a bios issue,maybe reset optimal default values.Update it if there's a newer bios.Maybe even look at the ram,since 4 sticks,and look if speed,timings and voltage are set properly.
  4. herrwizo said:
    Overheating on your CPU is the most likely factor, either because of failed cooling / pump / fan or inadequate contact with heatsink / too much dust.

    Failing PSU is another potential culprit. Definitely check your cooling first. Does it even turn on?


    This did cross my mind briefly as I only installed the cooler on Saturday! However when I did get the comp running and checked the temps using Speccy, on idle they were on 10-18 degrees! And when gaming it struggles to get above 30! So its not an overheating problem!

    Vic 40 said:
    herrwizo said:
    Does it even turn on?

    Look,

    Anonymous said:

    So this morning I go to switch my computer on, it begins the boot process and after about 15/20 seconds, just switches off. Completely. I try booting up again 2 more times to be faced with the same issue, it begins to boot up and is displaying the boot process, then after about 15/20 seconds, switched itself off yet again!

    It was at this point I decided to adopt my old mans rule (albeit a myth) of leave it 30 minutes and it will have fixed itself! Complete hokum! However after the 30 minutes, I come back, switch my computer on and boom! It's working. However I'm not convinced.




    You could look at the psu,i've had personally an AX 760 which would not work with my Asus Z77 motherboard,would sometimes give start problems with a rail out of spec warning.It does work fine in another rig and the Asus board works fine with another psu.
    Could also be a bios issue,maybe reset optimal default values.Update it if there's a newer bios.Maybe even look at the ram,since 4 sticks,and look if speed,timings and voltage are set properly.





    I'm at work atm so sorry if my replies take a while! I was thinking perhaps something to do with the RAM as I fitted the cooler on Saturday just gone (31st Jan) and in doing so, decided to remove one of the RAM sticks during the installation process just so I had a bit more space to move around... It clicked back into place correctly but perhaps I was being unobservant and something managed to find its way into the slot! No idea, I'll open the computer up and have a look when I get home! I'll also take a look at the PSU although I don't think it will be the problem, it's been running fine for 11 months now! I'll still have a look though!
  5. Also look if the new cooler is seated properly.Maybe also reseat all four sticks to be sure.
  6. Vic 40 said:
    Also look if the new cooler is seated properly.Maybe also reseat all four sticks to be sure.


    I'm 99.9% sure the cooler is seated properly, its pretty self explanatory and I didn't even need to change the backplate! However I will check it when I get home! (Can never be too sure!) I'll also reset all the RAM cards! Keep your fingers crossed for me guys! ^^
  7. open up event viewer in Windows and look for critical errors.

    check some parts:
    Furmark burn in, check Temp after 10min

    Prime95 (smallfft) + CoreTemp (install without toolbars) for CPU, additionally run CPU-Z, if frequency goes down while running prime

    Memtest86+ install to empty USB thumb drive, after that it´s bootable http://www.memtest.org/#downiso

    HDD with manufacturer tool, eventually update Firmware

    3dmark 2013 (firestrike) machen und den anschließend angezeigten Ergebnislink hier posten

    all power plugs, ATX12V 8Pin into Mainboard,
    all graphics card plugs, 8Pin and 6Pin inserted

    update BIOS in BIOS itself (UEFI), never in Windows

    Are you using Win 7 or Win 8.1?
  8. helpstar said:

    3dmark 2013 (firestrike) machen und den anschließend angezeigten Ergebnislink hier posten

    I hope he understood that.:D
  9. upsi :) copy paste mistake ;)

    translation:
    run 3dmark (firestrike) and post the result link, which is shown directly after the benchmark
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