Q840av gets a make over

Does the motherboard have a label for the connector in your Power Mac 8600? Is it J20?
In the Power Macintosh 9600 schematics, J20 is called "Product LED" and has 5 pins.
https://www.macdat.net/repair/apple_schematics.html

The five pin power LED header is labeled J38 on my Kansas PM8600.

The LED I'm using does indeed have the loop to tell the board that it's in a tower case. All these years I'd thought it must have been the power supply that provided that information, and couldn't understand why my current "desktop 8600" identifies itself correctly.
 

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