Thanks for your response Clinton.
The top row pin 2 is +5V, pin 3 is GND. In the pic it looks shorted, but it is not. Its just solder flux I didn’t remove. Attached is the schematic I have been able to trace out so far. The 3 pin devices look like MOSFETS considering the wiring. (like what I have included lower left) The green labels are voltages I measured when the Pi was operating.
Don’t put too much more effort into this, it has been an interesting side project for me, reverse engineering the circuit. I will see what happens with the new one I have purchased.
Cheers
