WEIRD, very weird starup problem.

leishi85leishi85 Grand Rapids, MI Icrontian
edited May 2004 in Hardware
this is very weird.

here is what happens
if i turn my computer off, and do a cold boot. i PRESS the power button, and then the lights in my case, dna fans and everyhintg just get powered for not even 1 second, and then it turns off. and if i try to press the power button again, it won't do anything, not until after i unplug the power and repeat the process over.

and if i just leave the computer there for couple minutes, and i press the power button, it works.

and if the computer is running, FOLDING at 100% it's completely stable, last time i had it run for over 20 days and no problems what so ever, and all the rails on my PSU looks fine too.

what is the problem?

Comments

  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited May 2004
    It almost sounds like a phase generator (sorry, my terminology is probably wrong) in the PSU is off, as if the PSU pumps out the correct voltage only to switch to a different currency just as your motherboard starts to power up. Yeah, that is weird.

    Wild guess - maybe your CMOS battery is going bad, or there's a short. But that doesn't make sense; it seems like that would cause you to lose your BIOS settings.
  • ThraxThrax 🐌 Austin, TX Icrontian
    edited May 2004
    CMOS battery is plausible.

    The PSU voltage regulator is plausible.

    Those are the two suspects I would look at, as would leo. :)
  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited May 2004
    If it were my system, I'd see if I could just borrow another PSU, fire up the box, and see if the problem persists.
  • leishi85leishi85 Grand Rapids, MI Icrontian
    edited May 2004
    i can try CMOS battery first, but what about PSU voltage regulator?? what can i do about that?
  • ThraxThrax 🐌 Austin, TX Icrontian
    edited May 2004
    Test the system with a new PSU.
  • leishi85leishi85 Grand Rapids, MI Icrontian
    edited May 2004
    alright, just tried a different CMOS battery, it didn't help at all, so PSU next, but too bad, i don't have any laying around.
    any other sugggestion, damn it this sucks, this weekend is LAN, and this happens
  • LeonardoLeonardo Wake up and smell the glaciers Eagle River, Alaska Icrontian
    edited May 2004
    but what about PSU voltage regulator?? what can i do about that?
    Should that prove to be the problem, what can you do? Scrap the PSU, purchase a new. Unless you are a whizz-bang with electronics testing equipment and soldering. In my book at least, the only thing I'll attempt with a PSU is swapping out its fans. Heck, I even ruined a PSU simply adjusting the voltage POTs (potentiometers).
  • leishi85leishi85 Grand Rapids, MI Icrontian
    edited May 2004
    sounds like RMA time for my newly bought Fortron Source PSU, damn it LAN this weekend, i don't know what to do,
    i should call newegg, and see if they can cross ship, and hope it gets here on friday.
  • pcscustompcscustom Oklahoma
    edited May 2004
    Here is one for you. My computer when i go to turn it on in the morning, It will turn on and every thing will buzz away but, I have to press reset for anything to show on the screen.. I have not been able to figure this out for the longest time but have gotten used to it.

    Trev
  • ClutchClutch North Carolina New
    edited May 2004
    See if someone coming to the lan has a PSU you can test with. I'm sure we can break down a system and do some trouble shooting for you there.
  • Straight_ManStraight_Man Geeky, in my own way Naples, FL Icrontian
    edited May 2004
    leishi85 wrote:
    this is very weird.

    here is what happens
    if i turn my computer off, and do a cold boot. i PRESS the power button, and then the lights in my case, dna fans and everyhintg just get powered for not even 1 second, and then it turns off. and if i try to press the power button again, it won't do anything, not until after i unplug the power and repeat the process over.

    and if i just leave the computer there for couple minutes, and i press the power button, it works.

    and if the computer is running, FOLDING at 100% it's completely stable, last time i had it run for over 20 days and no problems what so ever, and all the rails on my PSU looks fine too.

    what is the problem?


    Um, wild idea.... See if BIOS, when you DO get it to go on, is set in power management part of BIOS to suspend when the power button is pressed.

    When XP is trying to shut it down, the dang thing might be suspending. And, if this is NOT XP that is ruuning, please tell me what version of Windows or what other O\S IS running, OK??? Once I am certain about what O\S you are using we can try a couple things....

    Just for kicks, try holding in the power button for 4-8 seconds straight, until all the lights on the computer go out-- can you now get the computer to power up after ten seconds or so???? If not check the BIOS Power Management and the polarity of the connectors for the Power Swtich, reset switch, and Power LED (that they are connected right as to right wire to right pin on motherboard, seen some real weirdiities when someone manages to get the negative wire and the positive reversed, or gets the power switch connector hooked to reset pins, and like that), and make sure you have the right KIND of power supply.

    Added:

    PSUs of type 2.0 are not all type 2.03 and how they sense a power up signal is one of the differences. Second, if you take a case that is older, stick a modern board and modern 2.03 PSU in it, the switch might be holding power-high for too long-- PSUs of 2.03 type need a specific time cycle of low-to-high-to low to power up right. Given that, holding switch IN or depressed for too long, or having a switch button that sticks in depressed position can do this also. That can cause the set of things talked about in this thread also.

    Take it to the LAN, along with motherboard manual, Leishi. The other poster with weird thing should check this set of things also. A reset switch that powers up computer can be the reset leads with little two wires and connector connected to the reset pins on motherboard.
  • leishi85leishi85 Grand Rapids, MI Icrontian
    edited May 2004
    Running winXP here, and i'm sure all te connectors are right.

    I will try to power button holding idea, and then i will try to find a different PSU and try if it really is teh PSU problem. If it is, i will call newegg see if they can crossship the PSU, And most likely wont have a PSU for the LAN< someone plz bring an extra quality PSU.
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