Arduino Due troubles...

Hi all, i should say i am new to arduino, although very experienced with electronics.

I have an issue with a Due (probably clone) and would appreciate any help...

The due’s programming port works, i can upload any sketch (all are verified ok), but i very much doubt it works. Even trying to blink a led does nothing.
The native port appears dead. The board gets power, but its not detected at all.

Optically the board looks intact (all inspected with a magnifier).
Voltages all around mesure ok.

Do i declare it scrap?