Hi, I've been programming a sketch and in the middle of testing it, the Arduino froze, deleted the sketch, and loaded the standard Blink sketch. I tried reconnecting it to my computer, but LED 13 was still blinking. It's not a problem, I can just reupload it, but I'd like to know how this happened.
The Mega itself can not load any sketch. Is what you observed indeed the blink sketch (1 second on, one second off)? Or can it be the short flashes of the bootloader on the Mega waiting for upload (I assume that that behaviour is te same as on the Uno)?