Look at the small chip near the USB port:
Verify the cable works with another data device (like a smartphone). Switch to a shorter, high-quality USB cable. 2. Verify Device Manager (Windows) Right-click the Start menu and open . arduino uno drivers
The Arduino Uno acts as a bridge between your computer (USB) and the microcontroller (the ATmega328P chip). However, USB communication requires a USB-to-Serial converter. Look at the small chip near the USB
The onboard "L" LED will start blinking continuously. If you run into any errors during this setup, tell me: Your operating system version. If your board is an official board or a clone . arduino uno drivers
Only Windows (especially older versions) and some clone boards require manual driver installation.