Second opinion please anyone ?

Discussion in 'PC Hardware' started by logicwatch, Jul 17, 2015.

  1. logicwatch

    logicwatch MDL Member

    Jan 26, 2011
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    good evening all

    I am just looking for a 2nd opinion on a hardware fault on a PC I am looking at.
    The PC boots then after just a few mins ( can vary its random ) it just switches itself off again.
    I have swapped out PSU = same fault ( thought this was going to be the issue )
    swapped out Ram = same fault
    reseated & re thermal pasted CPU = same fault

    so that leaves me with a faulty processor or faulty motherboard ?

    but this leaves me with the problem of which one to order first as there is no way really of knowing which one is the faulty item ?

    the processor is amd A4-3300 dual core
    the motherboard is a asus F1A55 - M LE

    thanks in advance
     
  2. s1ave77

    s1ave77 MDL Guide Dog/Dev

    Aug 15, 2012
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    Since it's mostly the mainboard that dies, i would vote for this :g:. The only dead CPUs i met so far died together with the board or due to incorrect seat of heatspreader (ages ago).
     
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  3. MrMagic

    MrMagic MDL Guru

    Feb 13, 2012
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    Reinstalled Windows before writing off your hardware?
     
  4. logicwatch

    logicwatch MDL Member

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    #4 logicwatch, Jul 17, 2015
    Last edited: Jul 17, 2015
    (OP)
    Thanks for the reply but it can do this even when you are in the bios screen so I don't think a windows reinstall is going to make a lot of difference.
     
  5. QuantumBug

    QuantumBug MDL Developer

    Mar 7, 2012
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    Just like a PC, remove everything except screen, memory, processor and cooling system. See how it goes. And I mean everything, no mouse, keyboard, wifi, lan, modem, pcmcia, nothing at all left attached that isn't essential. Let the machine boot and leave it.

    What is the motherboard full serial? From the actual board itself.

    Check capacitors also because they're easy to replace if dead.
     
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  6. logicwatch

    logicwatch MDL Member

    Jan 26, 2011
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    Asus motherboard printed on it states F1A55 - M LE
    have tested with everything unplugged = same error after a few mins

    interestingly after a shutdown / power loss
    the power on will not respond for 2 or 3 pushes of the button then it powers up again and repeats the shutdown after a few more mins ( random sometimes nearly straight away other times after 2 / 3 mins )

    I guess the motherboard is looking most likely ?
     
  7. s1ave77

    s1ave77 MDL Guide Dog/Dev

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    Check the capacitors, maybe this gives a hint.
     
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  8. logicwatch

    logicwatch MDL Member

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    am I looking for bulging tops ?
     
  9. s1ave77

    s1ave77 MDL Guide Dog/Dev

    Aug 15, 2012
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    Yep and other signs that may indicate they are dying.
     
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  10. QuantumBug

    QuantumBug MDL Developer

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    Yes I have a mini Asus PC in for repair that does the same, when you press the power all the lights flash for a split second and it has bad capacitors.
     
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  11. Michaela Joy

    Michaela Joy MDL Crazy Lady

    Jul 26, 2012
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    Also, check the power supply. If the +12V isn't up or faulty, the MoBo won't start correctly.

    :MJ
     
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  12. logicwatch

    logicwatch MDL Member

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    I have swapped out the PSU
     
  13. QuantumBug

    QuantumBug MDL Developer

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    Can you post an image of the caps at all? Especially around the processor?
     
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  14. logicwatch

    logicwatch MDL Member

    Jan 26, 2011
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    Well mega strange ?
    today its all running fine ??????????? what the ............. ??
    no switching off at all
    dam intermittent faults make it so very difficult to fix !!
    you can put money on the fact that as soon as I give it back it to the owner it will start playing up again.
    I will stress test it for a couple of days and see how things go but so far its been running for several hours with no fault whatsoever ??
    Previously I would not have got more than a few minutes without a complete shutdown!!
    Grrrrrrr !!!!! :confused:
     
  15. QuantumBug

    QuantumBug MDL Developer

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    Hmm, can you do me a favor?

    Unplug your charger, run Command Prompt as Administrator, type 'powercfg -energy' and press enter. When the 60 second process is complete can you upload your energy report for me to take a look at?

    Also, while you actually have the machine up and running it may be worth monitoring your temperatures.

     
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  16. Michaela Joy

    Michaela Joy MDL Crazy Lady

    Jul 26, 2012
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    @The Dev: I had a similar problem with CPU overheating. What I did was redo the heatsink with Arctic Silver.

    @logicwatch: Definitely worth looking at.

    :MJ
     
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  17. QuantumBug

    QuantumBug MDL Developer

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    #17 QuantumBug, Jul 18, 2015
    Last edited: Jul 18, 2015
    I had a similar issue, kind of hard to spot. Previously repaired laptop with thermal paste on the GPU... The thing is it needed a thermal pad due to a nasty gap, so the GPU was not making contact with the heatsink. In my honest opinion this is one to always look out for, I've seen it many times since. People repair laptops but don't take small things into consideration.

    My way to combat this issue: Whatever comes out, goes back in exactly the same way... even if it is a replacement. Like when repairing mobile phones. If you take a small piece of Kapton tape out, it's there for a reason for it being there, even if it is only 2mm x 2mm.

     
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  18. logicwatch

    logicwatch MDL Member

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    #18 logicwatch, Jul 18, 2015
    Last edited: Jul 18, 2015
    (OP)
    Hi guys thanks for the comments
    This is a desktop PC not a laptop
    I have re thermal pasted the CPU
    Temperatures are around 40c
    I am currently stress testing it and its been running for several hours no issues
    I cannot replicate yesterdays fault ?
    ;)
     
  19. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
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    it was likely power supply or caps.
     
  20. logicwatch

    logicwatch MDL Member

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    Well this morning after working on stress testing software all day yesterday perfectly today it now keeps switches off after just 5 secs. !!
    I must admit it does look like a PSU fault with these symptoms but I have swapped out the PSU with the same fault.
    I can therefore only conclude it is a power related issue with the Motherboard and will order one asap.