Arduino not working / not uploading
Connecting to the 5v/2A power supply would cause no trouble at all. Taking 4 minutes to compile is strange but unlikely to be related to the Arduino board. "programmer is not responding" errors are communication errors.


Did the program compile without errors?
Are any LEDs lit or blinking on your board?
Is the correct board selected in the Tools | Boards menu?
Is the correct port selected in the Tools | Ports menu?
Is the correct programmer selected in the Tools | Programmer menu?
Try another USB cable.
Try pressing/releasing the board's reset button right after you click the upload button.