Resoldered power switch with flux and tested with mulitmeter.

linear regulator removed, no change.

I also removed the usb connector and replaced with a new one. No difference. My usb power supply light flashes when connected which means there is a short somewhere.

I removed the extra header I soldered to the VIN/VCC area and i think i’ve begun to damage some of the pcb traces. Copper is exposed in a few places. Posting picture.

My soldering iron is 60 watts, with a chisel tip. Plenty hot. Maybe too hot?

I’ve spent a great deal of time looking at my soldered connections with magnifier and nothing seems obvious. Anything I can check next?