Turn on Power Supply without Motherboard
Results 1 to 9 of 9

Thread: Turn on Power Supply without Motherboard

  1. #1
    Registered User Akuma's Avatar
    Join Date
    Nov 2001
    The Void

    Question Turn on Power Supply without Motherboard

    Good Morning,
    I have been looking around and have found two conflicting answers. I want to quickly test/turn on a power supply without connecting it to a Mobo. I have found that if you jump the green wire to a black wire with a paperclip and also jump the green wire to the gray wire. Which, if either are correct? Thanks for the input!

  2. #2
    Registered User
    Join Date
    Aug 2002

    Turn on power supply.

    PC Power & Cooling as well as several others make an ATX power supply tester for under $10.00 which completes the required connections, provides a load and lights an LED if all is well. This is probably the easiest way to do it.

  3. #3
    Registered User MobilePCPhysician's Avatar
    Join Date
    Jan 2002
    Cleveland, Oh
    For the colors, go to this:

    2. RE: Testing power supply
    DJ Net2Infinity Apr-28-02 04:50 PM
    In response to message 1
    LAST EDITED ON Apr-28-02 AT 04:52 PM (EST)

    You can test a ATX power supply without a motherboard, I do it all the time when troubleshooting. I am experienced with electronics ... and if you are not DO NOT TRY THIS.

    *** MAKE SURE THE POWER SUPPLY IS UNPLUGGED FIRST *** Simply Jumper Pin 14 ( which is the green wire) to any of the ground pins which are 3,5,7,13,15,16,17 ( all which have a black wire). I use a paperclip to do so, just stick the paperclip into the connector like you would be pluging it into the motherboard.
    Sergeant WOTPP

  4. #4
    Laptops/Notebooks/PDA Mod 3fingersalute's Avatar
    Join Date
    Jun 2001
    just be careful, not every atx power supply will use the same color schemes for the wiring, as current could care less what color the insulator is around it.

  5. #5
    Registered User MobilePCPhysician's Avatar
    Join Date
    Jan 2002
    Cleveland, Oh
    Good point 3fs. Go by the pin number and you'll be ok.
    Sergeant WOTPP

  6. #6
    Registered User xpuser357's Avatar
    Join Date
    Apr 2004
    Poplar Bluff, Mo.
    I have a Dell power supply and # 18 slot is empty. I am just curious
    what that controlled or powered. Computer was given to me ,Pentium4
    but Agp video card and connector was almost twisted on board and harddrive
    was shot (NO GOOD) Called Dell and gave them service tag # and confirmed
    last owner now it was officialy mine. They transfered me to purchasing for
    new mother board. They wanted $325. For just the BOARD. Pulled Cpu and gave to brother now he has pentium 4 Computer with Foxxconn mother board. Have
    Dells power supply hanging around.

  7. #7
    Registered User TechZ's Avatar
    Join Date
    Apr 2003
    Bahrain, Middle East
    Powering Up A Standalone PSU Guide!


  8. #8
    Intel Mod Platypus's Avatar
    Join Date
    Jan 2001
    Quote Originally Posted by xpuser357
    I have a Dell power supply and # 18 slot is empty. I am just curious what that controlled or powered.
    Pin 18 - negative 5 Volt supply.

    The -5V was made available for legacy compatability with old technology. The ISA bus specification required it to be present, even if practically nothing actually needed it.

    It's disappearing from more recent specifications, eg SFX (small form factor) PSUs.

  9. #9
    Registered User
    Join Date
    Dec 2011
    South Africa
    Just in case someone stumbles upon this page like I did via Google, you can test a PSU without a PC or motherboard simply by using the a paperclip to "connect" the green and black wire (any one of the black wires)

    Source: http://cyberst0rm.blogspot.com/2011/...upply-psu.html
    Last edited by uganrza; January 13th, 2012 at 04:07 AM.

Similar Threads

  1. Help With My Power Supply!!!
    By rjalb1 in forum Tech-To-Tech
    Replies: 11
    Last Post: July 28th, 2005, 05:08 PM
  2. is this power supply good enough? (specs inside)
    By coolmandingo in forum Tech-To-Tech
    Replies: 5
    Last Post: August 4th, 2004, 11:38 AM
  3. Replies: 4
    Last Post: August 2nd, 2004, 10:19 PM
  4. Faulty motherboard or weak power supply?
    By klintman in forum BIOS/Motherboard Drivers
    Replies: 12
    Last Post: January 22nd, 2002, 06:48 AM
  5. [RESOLVED] unable to load NVIDIA Drivers!!!
    By bjstevens40 in forum Video Adapter/Monitor Drivers
    Replies: 4
    Last Post: April 3rd, 2001, 07:08 PM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

We have made updates to our Privacy Policy to reflect the implementation of the General Data Protection Regulation.