Thanks Jerry, Vince, Ralph and others
I cutted the pcb to disconnect capa and socket REF pin from the AREF processor pin (if the problem have been a short capa or short circuit on this part of PCB it may erase the problem)
BUT no change : i've still contact (0 ohm) between AREF processor pin and ground (and 220mA if powered !)
So it looks like a bad nano board and i might have to change it (main problem is to extract it without destroying raduino PCB as we discuss early)
1-Do you know if I can get spare Raduino and how (#ubitxsupport #ubitxwarranty) ? perhaps i could get one as warranty feature, because mine never worked fine (if possible with nano socket, or without nano board -i've already some)
2-i'll try to borrow an air heater (looks fine for the job, Vince do you have a link to yours ? 852, 878) or use diagonal cutters (perhaps dremmel but i fear leaving a lot of small metal particles)
I'll give you news
73 - Remi
