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No power when floppy(4pin) is connected...


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I am building my first computer out of the parts in my sig and I ran into a problem. The board will not power on (i.e. spin up the fans) when the 4pin floppy power lead is connected to the board. If I disconnect it the board powers up just fine... I tested the power supply for a week on a Xp 3200+ running [email protected] 24/7 and have checked the rails with a multimeter, everything about the psu seems fine. Anybody know whats goin on here?

 

With 4pin(floppy) connected

http://www.storemypic.com/uploads/ad2d031a2a.jpg

 

Without 4pin(floppy) connected

http://www.storemypic.com/uploads/15f0a1cebc.jpg

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check to make sure the cable isn't off by one pin.....i know it sounds retarded, but i did the very same thing and it wouldn't boot....good thing i guess...one pin was exposed, only three were plugged in...should have built it outside of the case

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Pins are correctly installed (according to the psu's manual) but I can't figure out how to test the connection any other way than to plug it into the mobo...

 

@ about building it outside of the case, I will when I get all of my parts. I am just kind of pre-fitting everything right now :)

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Pull the connector and make sure you are plugging it in correctly. There were some manuals that had pin1 on the wrong side.

 

The bottom of the floppy power plug has the wide edge. It should go up against the tab that is next to the pins.

 

Pins are correctly installed (according to the psu's manual) but I can't figure out how to test the connection any other way than to plug it into the mobo...

 

@ about building it outside of the case, I will when I get all of my parts. I am just kind of pre-fitting everything right now :)

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Make sure the connector isn't reversed. It is keyed just like a floppy drive power connection.
There is only 1 way I can plug this in (as is intended) If you hold the connector with the odd sized grove down, wide part up) then from left to right pin 1 is =5V 2 an 3 are ground and pin 4 is +12v.

 

pic: http://www.storemypic.com/uploads/2e2c21ca75.jpg

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Looks like your floppy power connector is wired backwards. The Red and Yellow leads are reversed.

 

Look closely at the floppy power connector in this image. You will see that the leads on your connector are backwards.

http://www.newegg.com/Product/ShowImage.as...ly%20-%20Retail

 

There is only 1 way I can plug this in (as is intended)

 

pic: http://www.storemypic.com/uploads/2e2c21ca75.jpg

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