Hi, I just got my new UNO R3 board, when I connected to the USB port, the board didn't turn on the power on LED. No flashing LED, I don't even hear the USB tone's sound whenever u plugged in an USB device. It didn't show USB device detected msg box, no "unknown USB device detected" msg box appear at all. The board is seem just death when plugging into USB port. But when I power up using external power source, the board able to power up and I can see the power on LED turn on.
I am using Levono ideapad y550 laptop. When I browse my device manager, I don't see port(COM & LPT) device in the list.