When I power my Arduino NG with an DC adapter many times the script does not start. The power led is ON but the program does not start running. I have to try many times until (usually) it works. That does not happens when powered through USB.
I've try the following adaptors and they all have the same problem: - 9V 1200mA 15W - 12V 1200mA 15W - 12V 2A ?W
Any idea of what can cause the problem? To many mA??
Thanks a lot in advance.