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Dell optiplex 990 SFF front IO pin layout

Hi,

I was wondering if anyone would know the pin layout to the front I/O 34 pin plug on the dell optiplex 990 SFF. I have seen forums on other models of this computer however not on the optiplex 990. The plug i need the layout for is below.

20220514_125008.jpg

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if it has that many pins it's going to go to a smaller circuit board with components on it rather than just a board with traces on it.

if you just need the power button signal though you can just run a screw driver across all the pins and see which two turn the board on.

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