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not sure if this even belongs here on byoac (power question) update
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SpeedEng:
im sorry im not sure where this belongs

got a off beat question

have you guys/gals ever seen this type of power plug?
http://www.laptopspower.com/img.php?id=a12.80.04&w=300
http://www.lcdpart.com/images/4pDin.jpg

how can I find out which one is power and ground (on the mother board side) because I dont have the psu :( (tryin to make one if I can )

update found out from gigabyte
power is DC input of 19volts 6.32amp
kelemvor:
Could get a voltage meter and find out...
DaOld Man:
I first thought that too, but then I double read it, and he said he didnt have the power supply, just needs to know what connections to attach another power supply to on his board.

SpeedEng: Do you have a make/model/version number of the motherboard?
It should be printed somewhere on the board.
That may help to find a manual on the net, which may show the pinout connections.
xar256:
It looks to me like a power supply used by old IBM laptops. (P1 and the like).  Need info on the mainboard before we can be of more help.
BobA:
I had an LCD monitor that needed a new PS and did not have info on the power plug.   It was the same config as yours (4 pins).  Turned out 2 were +12V and 2 were ground.  I established which were ground by disassembling the LCD monitor so I could see the power connection to the PC board in the monitor.   This told me which pins were paired.  This can also be confirmed with a ohm meter.   To establish the gound I checked how the pins were connected and looked for the gound plane of the PCB.  It is usually the largest conductive area.  To make sure this was the ground I checked the polarity of any electrolitic caps that were connected to it and established where the (-) lead was.   To double check my work I traced the other lead which was 12V power to some regulators and other chips to establish the power pin.   

Sorry but a fairly detailed examination of the PCB is required but it is one way to check if you cannot find a manual.

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