Arduino Due frozen on first powerup

Hello,

i have weird problem with arduino Due. When i power arduino due it remain frozen - loaded program is not running - but arduino accept programming using usb cable. I have simple program just to flash pin 13 led so it is definitly not software. When i press reset button on board it start to work. When i reboot it after it still working ok but when i unplug it from power for few minutes then problem is back. I did try programming and native port, external 5V power, try 3 different arduinos and it is still the same. Is there any special way how to program due ?

thanks m.

Ok, problem found, faulty version from china ... whole pack, all units ... replaced with original and it's working ok. I heard that problem can be solved with firmware update.

m.