aket

Thanks for the answer @attila! Indeed that's what I feared...

Hello, One of our AD2's stopped working while being powered through USB, the PC doesn't detect the USB device at all. I suspect something went wrong with the PC's USB ports (we've had other issues with other equipment in the past). It didn't work as well on another setup on which I also use an AD2, so I imagine something in the power supply fried, although no component look damaged. The LED does not turn on. I checked these two threads which seemed relevant: The ferrites seem OK, as well as the connections (cf 1st thread). I checked the tensions from the FTDI chip (cf 2nd): VCCA and VCORE are OK at +1.8 V, however VPHY, VPLL, and VCCD are all at +5.0 V instead of +3.3 V. I suspect there is an issue with the built-in regulator in the FTDI chip. Would replacing the FTDI chip fix the issue, or could another component be damaged? Thanks! :)