L Led Flashes Constantly

Hello,

LED 13 is non-stop flashing and can’t upload any script
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: Send: Q [51] [20]
avrdude: Recv:
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

Please Help

Along with that message, there is a link to the Troubleshooting section. Complain on the forum, in the wrong section. is way down at the bottom of the list. You are supposed to try the steps in order.

Also, the LED flashing does not indicate any kind or error.

These boards come with the 'Blink' sketch pre-installed.