I've found the problem, it's another open track from r611 to pin 6, I'll make the bridge and see if it's the cause of my anguish
Indeed, that track was the fault, it is now working well, thank you very much Mr. Perry for your valuable support
I figured you saw it but if you didn't, the JL section on the 'Repairing Physically Damaged Traces' in the directory may be helpful if you have to do this again.