Question about HP Bestec ATX-1956D 200w HP Part No 0950-4106 (ATX1956D) Power Supply

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Want to use the atx-300-12z as a hobby power supply. Need 12vdc.

The supply came from a computer that died. Wasn't very old and the supply did work. I want to use it to power a very small amp in my workshop. I get 3vdc from the green to all the wires on the same side of the 20 pin connector as the green. I am assuming that something got 3vdc on the board to power up the 12vdc output. Can anyone help me?
Barb

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You're asking for a fire or just burning out the power supply. But,at your own peril, check the yellow wires for 12v or buy a power supply test adapter from ebay. It bypasses the power switch usually done by the motherboard & will fire up the power supply like it was connected to a board. Then test the wires for 12v. Should be any yellow wire,red is 5v. Green is 3.3 or 3v.

Posted on Jul 22, 2009

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