Hi @ad2user2019 If you want to troubleshoot the device, you could verify the ferrite beads are ok. You should measure about zero ohm when the device is unpowered, and about 5V between VBUS and GND when connected to USB. The next to verify would be the USB controller power rails. Analog supply switch, IC20, when the device is detected but you get error during connection to the device. Internal rails, in case the oscilloscope reading and/or AWG outputs are wrong: