Q: I am looking for one from a 4tb drive. Drive used 4 or 5 times as backup of data then powered off. Doesn’t power on at all.
A: https://www.hddzone.com/seagate-pcb-100797092-p-1977.html is your donor PCB. When you get this PCB, you need to move your original PCB’s BIOS to the replacement PCB. The 8pins (4 pins on each sides) with 25P05VP、25P10VP、25F512、25F1024、25F1024AN、SST25VF512、SST25VF010, etc. are the BIOS.