please, can you help me to solve this issue. I have a problem with Arduino Uno .atmega 328p Mega 16u2. When I connect uno with PC there is no notification sound and no unknown device in device manager. the Arduino Uno is not communicating with pc, but the led blinks continuously.
below is the arduino
Make sure the USB cable is completely plugged in to both the Uno and the PC.
You may have a damaged/defective or charge-only USB cable. Try a different cable.
Sometimes USB 3 ports can cause problems. Try a USB 2.0 port or a USB 2.0 hub plugged into a USB 3 port.