Ok, I have been able to read the ROM from the patient (771814) and write to a 771820 SATA PCB. in both cases it finished saying OK so i assume the process went right. so i screwed the SATA board on the patient drive and the drive came ready after a few clicks. when i started the utility it was detected without Model, Serial, FW, or capacity. Where did i went wrong?
BTW, i am a member in other DR forums too but this is where i got the swiftest replies. So a big THANK YOU.