TechSpot

Computer wont POST

By dustin_ds3000
Aug 6, 2008
  1. today my new motherboard can in the mail so i switch them out and i was going to use the old motherboard for the family computer. now the problem isn't with the new motherboard its with the old one. i bought new ram to match the ram i had already amd i changed the cpus heatsink and fan to at stock 462 cooling unit on the old motherboard i put the motherboard in an old case that already had an psu, hdd, and a dvd drive. now when i turn it on all i get is a black screen and the led on the monitor stays yellow. all the fans are running and i can hear the hdd.

    things i have tried
    removing new ram, removing old ram
    new psu
    fx5200, and onboard video
    clearing CMOS
    i made sure nothing was grounded out

    im stuck and my family needs this computer so they can stop getting on mine
     
  2. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    Just in case

    Can you unplug the CPU fan (for 5 secs)
    Then turn on

    Just be ready to pull the power out if it starts (or either way, after 5 secs)

    I have seen issues with the cpu polarities errors causing this, that's all

    Let us know if it posts
     
  3. dustin_ds3000

    dustin_ds3000 TechSpot Chancellor Topic Starter Posts: 869   +8

    this seams unsafe but at this moment i have nothing to lose, will try now
    ok i tried and i even waited 10 seconds. it did not work
     
  4. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    OK, case fan? (should have mentioned that too (also just 5 secs)
     
  5. dustin_ds3000

    dustin_ds3000 TechSpot Chancellor Topic Starter Posts: 869   +8

    i looked at the cpu again and it looks like some of the edge of the core it broke, i hate when that happens. the amd's xp+ with its unprotected cores. i will confirm this tomorrow with my other amd xp+
     
  6. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

  7. Justin

    Justin TS Rookie Posts: 942


    I want you to cite ONE reference of CPU "polarities" causing this issue.

    You won't. Because what you said is completely nonsense.
     
  8. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    I've experienced it myself twice

    And I've repaired a stranger (ie a member) here at this board, by quoting the above!
    And he replied Thank-you to me. So it does exist!

    I don't know all the data/ or power issue that causes it (probably I could find it I'm sure)
    But it is TRUE (on minimal cases)
    Seeming many try so many options first, I now (through experience) state this.

    Citing one thread I'd have to look it up here (definately here)
    But why? I already know it can happen!
     
  9. Justin

    Justin TS Rookie Posts: 942

    Processors do not have "polarities".
     
  10. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    I'm talking FAN here, by the way !

    And as a tech person (possibly like you) I don't like explaining why I Know things (ie you got a few years, for me to explain?)
     
  11. Justin

    Justin TS Rookie Posts: 942

    You said, yourself, "CPU Polarities". Read it again.
     
  12. kimsland

    kimsland Ex-TechSpotter Posts: 14,524

    Typo!

    .....Fan
    cpu ... polarities
    .......^

    Thanks for picking that up, for me.
     
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