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Thread: PC Does Not Always Boot on First Try - PSU?

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    Default PC Does Not Always Boot on First Try - PSU?

    I have a system that does not always boot on first try. Sometimes it will boot, sometimes it won't. Especially when it's cold and it's been sitting for a while there is a good chance it won't boot. It will pass POST then shortly after restart back to POST screen. The second time it will boot no problem, and everything is stable.

    Could this be a PSU problem? Although it seems to me unlikely since this is a fairly low power system, despite the age of the PSU.

    Only recently started getting this problem. Everything in the system is 6 years and the PSU ran this PC for 6 years except the GT 720, which I installed this year. Before that I had a 4770 and later on a GT 750 Ti. So other low power cards.

    Athlon 250 X2
    GA-MA770T-UD3P
    Nvidia GT 720
    1 HD and 1 Optical Drive
    Corsair VX550W

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    PSU and mainboard are the most likely suspects, I guess.

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    cheapie's Avatar
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    Quote Originally Posted by rty View Post
    Especially when it's cold and it's been sitting for a while there is a good chance it won't boot.
    Tried warming up the power supply? The motherboard? Bad caps often work slightly better (sometimes well enough, for a while) when warm.

    However, since you did state it passes the POST, I'm curious if it's even a hardware thing at all. Can you reliably get into setup on the first boot?

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    Sounds like the motherboard. Had this problem with my wife's PC in the winter.

    How cold is cold?

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    The easiest part to be replaced, is the PSU.
    Borrow one from a friend, and watch the results
    CPU:Athlon 64 FX60 (2-cores) 2,6GHz
    Mobo:Asrock 939a785g
    cpu cooler:ArcticFreezer13 CO
    RAM:4 GB DDR 400MHz
    GPU:Asus 750 Ti 2GB
    PSU:Seasonic Platinum 660
    Monitor:Asus VE228HR
    Tower:Coolermaster Elite 430

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    I've had a better look when it's starting up. It actually gets to the Windows loading screen when it hangs and restarts.

    About 15 degrees Celcius cold.

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    Wow! Pretty chilly!

    And when it's warmer, you do NOT have this problem? I have to assume this is the case and why you brought up the temperature in the first place.

    If it gets to the Windows loading screen, then we can't really isolate this to PSU and motherboard.

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    quest for silence's Avatar
    quest for silence is offline Silencer & heathen relic of a human (™ by OW)
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    Quote Originally Posted by rty View Post
    15 degrees Celcius
    Celsius.
    Best, Luca

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    I always have a spare psu for troubleshooting. doesn't have to cost that much. after MIB shouldn't cost more than $15. from my experience its always the psu that goes bad

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    MIB? I think you mean MIR (mail in rebate). MIB is typically "mint in box".

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