Bench test mobo, power-on problems

By diddlyidi
Jul 5, 2008
  1. Hi
    I have my motherboard sat on a cardboard box attached to hard drive with OS installed,graphics card,2 sticks of memory,keyboard and mouse and everything seems to be working fine apart from powering/starting up problems.
    On pressingthe power button on the case sometimes it starts sometimes it doesn't.
    I have also tried another PC case thinking it might be a dodgy power button but the same thing happens with the other case.
    Sometimes i have to disconnect the power from the wall socket before it will start up.Once it starts up it is absolutely fine and stays on with no problems.
    Do I have to change something in the bios
    The mobo isn't a new one it is a MSI 6526 ver 3. and I have a pentium 4 1.8gHz CPU
    Any advice would be gratefully appreciated
    Thank you
  2. kimsland

    kimsland Ex-TechSpotter Posts: 14,525

    Always disperse the internal voltage (by removing the power cord, then holding in the ON switch for 30 secs)

    Make sure to disconnect everything internally (ie all addon PCI devices, and CD/DVD connection and floppy connection (if you have one) from the motherboard

    Actually here's a good BenchTesting guide.

    One last possibility, I have had faulty case and CPU fans cause boot up issues.
    And faulty Power Supplies (doing strange things)

    You should also reset CMOS to defaults
  3. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,185   +225

    Nice post kimsland,

    " I have had faulty case and CPU fans cause boot up issues"...

    "Faulty cases" are really bad power supplies and power switches. That Bench Testing Guide is great!
  4. diddlyidi

    diddlyidi TS Rookie Topic Starter

    Thanks Kimsland.Thats the guide that I followed to bench test the motherboard.
    i have tried another case and the same happens with that one.I'm beginning to suspect a faulty motherboard
  5. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,185   +225

    "I'm beginning to suspect a faulty motherboard"...

    Me too
  6. Ph30nIX

    Ph30nIX TS Rookie Posts: 243

    He was referring to fans


    Maybe try changing your motherboard battery, should be a cR2032.
  7. Tmagic650

    Tmagic650 TS Ambassador Posts: 17,185   +225

    "One last possibility, I have had faulty case and CPU fans cause boot up issues"...

    It was a bit confusing, by the way it was written. All the fans would have to be the 3-wire type
  8. syllovesyou

    syllovesyou TS Rookie

    yeah it makes sense.
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