Seagate ST3750640NS SATA 3.5 PCB (9BL148-303, 3.AEK, 100406529 C)

This listing is for the hard drive circuit board (PCB / logic board) ONLY — no hard drive is included. Due to our large inventory, the actual PCB you receive may vary slightly from the photo. Intended for data recovery or HDD repair tasks, these replacement boards require proper matching and diagnostics before use. Please run our Hard Drive Diagnostics Guide to confirm a PCB swap will address your issue, and consult the Donor Matching Guide to ensure compatibility. Most Seagate PCBs store unique configuration data in the ROM "memory" chip; that ROM data is essential for correct drive operation and must be transferred or copied to the replacement board. If the ROM chip can be moved, a local computer technician can usually perform the transplant. For purchases of $60 or more we include a complimentary adaptation service that either moves the ROM chip onto the new PCB or reprograms the replacement board with the correct ROM data. If you plan to do the work yourself, review the PCB Replacement Guide. If a simple board swap does not resolve the problem, we also provide a comprehensive PCB Replacement Service — see the Adaptation Service page for full details.