i'm on v2.73. I have also removed data wires one by one (left side) to see any LED code, but nothing happens.
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Cleaned all solder joints, removed any flux left overs.
Checked all wires for continuity - all of them are good.
Additionally checked emmc ports to wire for continuity - good.
Checked for shortages - nothing found.
Yes, 3.3v is a little bit damaged, but still works (you can see that the Power LED is on)
Huge wires? Thats actually 30 awg
I'm sure that the soldering is good enough, my suspect is the PR2040. Is there any method to check the functionality of it? Unfortunately I have already removed the USB Port, would have tried to re-flash.
Awg 30 red vs awg 36 blue, with awg 30 you risk to rip pads.
I'm 99% shore the xiao is foulty.
if you whant to test if is still ok :
1 You can remove all wires and solder usb c port back and connect to usb c and pc and lock for blue light,**/**/**/sleep
2 Power the xiao pcb with bench power supply set to 3.3 v and lock for blue light,**/**/**/sleep
