Someone to give hint about the diode ?

It's probably a fast recovery type used with the inductor, hard to say what the spec is unless you have the circuit diagram or can see the markings on it.

 

If i shot in the dark and take off one from other motherboard with same vision(don`t laugh) what will happen worst - the diode will go to hell or maybe more ?

 

It looks like 30V zener diode BZT52H-C30.

See post #3