new system bootup woes

Discussion in 'PC Hardware' started by Adam, Dec 17, 2014.

  1. On Tue, 23 Dec 2014 20:33:29 +0000, Dustin wrote:

    snip
    Ceramic caps? From just higher than 12 volts. No way. Even the ELs
    are rated at 16 or 20 volts in those circuits. And those would take way
    higher than that to blow them.
     
    DecadentLinuxUserNumeroUno, Dec 24, 2014
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  2. Adam

    Godzilla Guest

    Nice newsreader, Fixadent.
    Good job.
    If your gonna use Linux, suffer with the rest of us.

    --
    _____ _______ ____ __ __ _____ _
    / ____|__ __/ __ \| \/ | __ \ | |
    | (___ | | | | | | \ / | |__) | | |
    \___ \ | | | | | | |\/| | ___/ | |
    ____) | | | | |__| | | | | | |_|
    |_____/ |_| \____/|_| |_|_| (_)
     
    Godzilla, Dec 24, 2014
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  3. Adam

    mike Guest

    Well, you're absolutely correct.
    However, as a practical matter, the measurement at the power
    supply terminals on the motherboard should not be ZERO. We
    could discuss forever what it should be, but it ain't ZERO.
    And if it is zero, the caps won't have any effect, unless one
    or more of them is shorted and the cause for it measuring zero.

    And if it's too low, but not zero, the power supply will probably
    come up and something will catch fire.

    I measured an old Dell Dimension 2550 board. Lowest number I measured
    from any of the (non-ground) power supply pins to ground was 121 ohms.
    I could easily tell that the measurement was not zero.

    I maintain that an ohms measurement will give you useful data.
     
    mike, Dec 24, 2014
  4. Adam

    Paul Guest


    If the value is exactly zero, I agree.

    If the value is a bit higher though, and you only
    have one of those motherboards, you don't really know
    what is "normal". If you have 20 boards, you can
    work out a mean value and a standard deviation.

    On the board where the characteristic value was 3 ohms,
    I was just a bit shocked when doing the measurement for
    the first time. It seemed kinda low. And could have been
    due to the excessive number of voltage divider termination
    networks on the board. Since that board used a fair
    amount of electricity, a low reading wasn't actually
    a cause for concern.

    Paul
     
    Paul, Dec 24, 2014
  5. Adam

    Adam Guest

    Thanks, and yes, "both" ATX power connectors (24-pin EATXPWR 2x12 and
    8-pin EATX12V 2x4) are connected to mobo.

     
    Adam, Dec 24, 2014
  6. Nice lame nym stupidity, jackass.
    As if the assessment of a pure putz like you matters.
    WTF are you jacking off at the mouth about, dumbfuck?
    You have no clue what platform I have up right now. This stupid,
    childish retard post of yours here is proof of that.

    You know there are about six PC in this room alone, right?

    You're an idiot. Nothing changed about the group's original
    assessment. Putzzilla is all you'll ever be, and all you'll ever suffer
    through... all alone.
     
    DecadentLinuxUserNumeroUno, Dec 24, 2014

  7. Absolute nonsense.

    Your grasp of electronics is too low... below zero even.
     
    DecadentLinuxUserNumeroUno, Dec 24, 2014
  8. Adam

    Adam Guest

    Thanks for the link. I plan to apply about
    the size of one uncooked white rice grain of
    "Arctic Silver 5 Polysynthetic Silver Thermal Compound Paste"
    to center of CPU.
     
    Adam, Dec 24, 2014
  9. Adam

    VanguardLH Guest

    Artic Silver is usually a waste of money. You pay for glitz that won't
    return much for reduction in temperature. It's for overclockers where a
    reduction of 1 to 3 degrees is perceived as a great reward on their
    endeavor. Those that go with Silver should also lap the heatsink and
    CPU plate to make sure they are really flat and have as much metal-to-
    metal contact as possible with the Silver only filling in the
    microscopic air gaps. Lapping takes a lot of time not only to get the
    surfaces flat but also to get them to a high reflective polish. Artic
    Alumina Ceramic is probably your best choice and a bit cheaper per gram.
    What, to apply voltage to a fan to see if it spins? If the BIOS sees
    zero RPM for the CPU fan (because the fan doesn't spin or the fan wasn't
    connected to the CPU mobo header) then the computer is immediately
    shutdown. So if getting the PC to power up is a problem and you're
    stuck doing micro troubleshooting (the big suspects have been
    eliminated) then, yes, testing the CPU will spin when powered is a
    reasonable troubleshooting step. Even if it spins, rotating it with
    your finger will let you know if there are any rough spots which might
    cause the fan to snag there and not let it spin if that's where the fan
    happens to land when the computer is powered down.
     
    VanguardLH, Dec 24, 2014
  10. Adam

    Adam Guest

    Do I need to upload photos to prove that I did not mess up the mobo? :)
     
    Adam, Dec 24, 2014
  11. Simply state how many PCs you have ever "assembled" and how many other,
    if any, electronic assemblies of any kind, have you worked with?

    If those answers are very low numbers, you could very well have done
    something wrong.

    This could be as simple as a not quite fully inserted and locked RAM
    stick.

    Those old, "No user serviceable parts inside." stickers meant something.

    Maybe even more now.

    But just like a fine wristwatch... you can go buy another one.
    Just get an experienced builder or electronics industry personage to build
    it for you.
     
    DecadentLinuxUserNumeroUno, Dec 24, 2014
  12. Adam

    Adam Guest

    We shall see but I doubt it.
     
    Adam, Dec 24, 2014
  13. Adam

    mike Guest

    OK, take the challenge.

    Find a 12V supply cap on your motherboard. Pick a feedthru cap so
    you can solder a 1-Ohm 1206 resistor on the back side
    across the cap. Orient the board so the resistor won't fall
    off when the solder melts.
    Get out your stop watch and hit the power switch.
    Tell us how long it took for something to get really hot.

    You'll probably have to use a higher resistance part to have
    it hold together long enough to burn the board. I picked the
    1-Ohm because I wouldn't want your arrogance to harm an
    innocent circuit board.

    And it's much more exciting if that's just leakage resistance
    in an electrolytic.

    Are we having fun yet?
     
    mike, Dec 24, 2014

  14. Most are flat contact surface these days. They get impinged upon by
    barbed contacts in the socket, when it gets locked. Very low chance to
    screw it up, but it is possible, I suppose.
     
    DecadentLinuxUserNumeroUno, Dec 24, 2014
  15. Idiot. My 20W 1 Ohm resistor would work just fine.

    Your pathetic SMD 1/16 W device can fail simply from an oily fingered
    **** like you touching it.

    You lack the true grasp you need to do this task. It is not a purely
    resistive load either.
     
    DecadentLinuxUserNumeroUno, Dec 24, 2014
  16. Adam

    Paul Guest

    I notice your board has three different versions.

    The latest board (Gen3 R2) has a DirectKey.
    As well as a DRCT header.

    Does the DirectKey travel work properly ?
    Is the button stuck down ?

    Is anything connected to the DRCT header ?

    My theory is, the front Power button, the DirectKey and
    the DRCT header all have similar functions. Some aspect
    of them may work in parallel with the others. Maybe the
    motherboard considers the button to be depressed all the
    time, and that's why it isn't starting. Currently,
    pressing the front Power button, is not creating the
    single pulse the system expects. Because one of the other
    inputs is keeping their button depressed.

    Paul
     
    Paul, Dec 24, 2014
  17. Adam

    mechanic Guest

    Aww look, DLUNU's found a new playmate...
     
    mechanic, Dec 24, 2014
  18. Adam

    mike Guest

    You might want to rethink the math on that one.
    Show your work.
    Or do the experiment and post some pictures.
    Your resistor and a car battery should do for the experiment.
    Be to grasp the resistor firmly with both hands.
    You mean the size of devices that you find on motherboards?

    can fail simply from an oily fingered
    If you're measuring with an ohmmeter, you're measuring the resistive
    part. A rocket scientist should know that.

    General advice...THINK FIRST...Your finger on that "send" clicker
    is too fast for your cognition.
     
    mike, Dec 24, 2014
  19. Adam

    Adam Guest

    The mobo version that I own is the one documented by
    mobo user manual version E6674,
    which does not mention DirectKey or DRCT.

    http://www.amazon.com/ASUS-Sabertooth-990FX-SATA-Motherboard/dp/B00539LU3E

    https://www.google.com/search?num=5....msedr...0...1c.1.60.serp..3.1.82.pK4yOTFbF2I
     
    Adam, Dec 24, 2014

  20. You might.

    ONE OHM IS ONE OHM IS ONE OHM. You fucking idiot.

    So YES, the SAME current through MY 20 W capable resistor will roast the
    piss out of your 1/16 W item.

    Can you really be that thick? What?... dyslexic thought pattern?
    Why do you get so many thing so ass backwards?
     
    DecadentLinuxUserNumeroUno, Dec 24, 2014
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