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System Not Starting After PSU Mod

Discussion in 'General Hardware' started by Midnite8, Jun 29, 2010.

  1. Midnite8

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    Well, I think I whooped myself by taking on the daunting task in sleeving my PSU. I plugged in everything and my system won't start. When I press power nothing turns on, I see the PSU fan move just slightly then nothing. :(
     
  2. Kantastic

    Kantastic

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  3. Midnite8

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    Ok, the fan spins! I didn't kill it after all lol, but now whats the problem them haha
     
  4. _JP_

    _JP_

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    Maybe you should see if there's continuity between the end of the cables. Might have isolated something.
    It could also be a short-circuit somewhere and the PSU's anti-short system is acting when you power it on, hence the fan only spinning for a short period of time.
     
  5. Midnite8

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    Well I opened the PSU and I sleeved the 24-pin and 8 pin, I only took out 1 pin at a time so I wouldn't mess up but just in case how would I cross-check if the pins are in the correct place?
     
  6. _JP_

    _JP_

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    Well, if you have a multimeter (and know ho to use it), that's an easy task.
    Take out your PSU and, without connecting it to any component, plug it to the mains and power it on like Kantastic said.
    Now, take your multimeter and start measuring.
    Set it to 20 Volts DC scale and check if every pin is where it should be.

    If you want, follow these images for guidance:

    (There is a color code for computer PSUs cables: Yellow = 12V; Red = 5V; Orange = 3.3V; Blue = -12V; white -5V)
    (the 3.3V cables seem to be pink in these pics, but they're Orange in the PSUs)
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]

    EDIT:
    Needless to say that if something doesn't match, there' something wrong with your PSU.
    It is pictured a 6-pin PCI-e connector, but the differences to a 8-pin are only two grounds to the right. Also, the 12V EPS connector pictured is 4-pin, the 8-pin is just another 4-pin side-by-side.
     
    Last edited: Jun 29, 2010
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  7. Midnite8

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    Ok, looked at the chart and compared, looks like I did switch up 2 wires lol that fixed it :) fan is running and everything
     
    Last edited: Jun 30, 2010
  8. Midnite8

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    What is the safest way to cut off wires from my PSU that I do not need, it is hybrid modular but I was doing some cable sleeving sleeving and messed up on the Sata Power Cables, they don't work so I just want to cut them off.
     
  9. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    de-solder them from the power point, thats the safest way.
     
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  10. Midnite8

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    So just cutting them off near the end isn't safe I presume since if it touches anything in the PSU it will damage it?
     
  11. sneekypeet

    sneekypeet Unpaid Babysitter Staff Member

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    I would assume if you want to ghetto engineer it, some tiny wire caps, electrical tape, or possibly heat shrink tube would keep the cut ends isolated.
     
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  12. Midnite8

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    I cut them off and put heatshrink on the tip and it is fully covered, I don't think I would have a problem
     
  13. Midnite8

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    Thanks lol, just reported that dummy spammer
     
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  14. neoreif

    neoreif

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    Spam busters to the rescue!!!!!!!!!
    :nutkick:
     
  15. Mussels

    Mussels Moderprator Staff Member

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    spammers are bad mmkay.
     
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