No, I don't.
I think I will have di de-wire all the chips and start wiring up again from scratch.
One thing that I noticed is that if I disconnect the Vcc/GND wires from the Arduino board, the power LED that I've put on the breadboard still has a faint light, as in the circuit some current is still running, maybe from the output pins of the Arduino.... I don't know if it's normal...
I know that putting a pin of the Arduino in OUTPUT state should generate a low current: maybe with 14 pins connected to the circuit some sort of parasite current is still running through the wires... don't know... 
This night I will have some time to check the circuit. Stay tuned... 