I just realised that I cannot blink the LED on digital ports 11, 12, and 13 on Arduino UNO, IDE 1.8.2.
I have found this error when I was trying to use Arduino as ISP... where these ports are essential...
BTW I also cannot blink the LED_BUILTIN (led on the board it self - L) with provided Blink example
Anyone has the same problem?
Did I fry the ports?
How to otherwise check the ports?
Is there a way to put Mega into factory defaults?
PS I have a USB dongle to rx, tx... indeed, I only need UNO to upload the sketch, could I do it via USB dongle and how?