I have been facing HID Detection issues. Few boards get detected. Whereas the detecting boards are found to have the same issue sometimes. There are no hardware changes that can be differentiated between detecting and non-detecting boards. Voltages are proper. I have checked the power sequence as well as the USB CAP voltage. Sometimes it shows inconsistency in USB CAP voltage. We have used 12MHz crystal and frequency seems matching to the requirement. The D+ of non-detecting boards have 2.8V when 'USB DEVICE NOT RECOGNISED' appears. Kindly suggest the solution.