(Another possible symptom: with just the board plugged in on its own, the TX light is now staying lit solidly except for when trying to load something, which is a bit weird. In normal operation of my setup I expect TX to flicker in response to inputs on A0-A7, and otherwise to remain off. Grounding the analog inputs makes TX go off. So there's some kind of unwanted interaction happening in there somewhere. *Sigh*)
Same problem, here. Went to a friend's place and successfully demoed the Uno and then tried the Mega. Nothing. The L13 led flashed slowly around once a second but never saw the TX or RX lights flash. Tried repeatedly and double checked the COM port.We purchased the Mega R3 from RS components for $60 recently and it appears genuine with the white screen printing on the back.
Problem with Mega2560 is huge. There are very many people with the same problem. Is there any official opinion yet? I'd really like to use my Mega2560 normally.
Quote from: Ragnar on Jul 24, 2012, 07:15 pmProblem with Mega2560 is huge. There are very many people with the same problem. Is there any official opinion yet? I'd really like to use my Mega2560 normally.Awesome, im so glad i got rid of my uno for a mega!Way to go Arduino, now i cant do anything.Same issue here. same on mac/ubuntu/and win 7I was warned not to get a mega and now i see why