Question about HP Compaq 175-Watt Power Supply

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COMPAQ 272776-001 Power Supply 200W

COMPAQ 272776-001 200 W Power Supply - I cant get the power supply to start when pressing the power button on the computer. In the past, it would start after pushing the power button several times, or turning on and off the power strip. I want to know which leads trigger the start of the power supply. There are red, yellow, and black going to the motherboard. I was guessing the yellow was the trigger. I wanted to know if I can jump leads to make it work. Like the yellow and black, or is it something else I need to do?

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  • moorebryan77 Mar 08, 2009

    thank you for your answer. My power supply came as part of the system. It has a push button on off cable instead of an on/off switch in the back. I beleive that the start button on all computers actives the power supply through the motherboard connection. I am trying to find out which leads going to the motherboard trigger the on/off for the power supply. I did try to push the power cord in. Because it did seem to be a problem. But it didnt solve it.



    thank you,

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They all do, I believe, I installed a new one, into my computer system not long ago, are you sure your power supply is one that the computer can handle? You shouldn't have that much of a problem - I wouldn't go pulling apart the wires on the power supply, its made like that for a reason, what you could try is see if your power supply has seated properly, sometimes if your not working on a flat surface the power supply plug won't go in properly and will not be pushed in all of the way, try laying your computer on its side, and pushing in the plug also, each motherboard has a certain amount of plugs for example 20 and 24, some motherboards want it to be a 20 power plug and others want it to be 24 power plug, thats the plug thats connected to your motherboard, that I'm talking about. make sure you have the right number, and that the motherboard plug and the power supply plug match, basically have the same number of connectors, (I mean that little white plug at the end of the red,yellow,black, wires, I hope this helps. ps- I really had to push on the white plug to get my seated properly

Posted on Mar 06, 2009

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