Received my first ever Arduino Uno board today (eBay from china). Installed the Arduino IDE on three different computers and two different cords. When I plugged the USB cord in, it never made a sound like other devices. I did not see anything new in the device manager.
The green LED lights and the yellow LED by an L on the board blinks fast.
I’m guessing I got a bad board. Any suggestions.
Attached are pics.