Seagate ST31000340NS SATA 3.5 PCB — 9CA158-180 / XR36 / 100468974 B

This listing is for the hard drive circuit board (PCB / logic board) only — the hard drive itself is not included. Because we have a large inventory of PCBs, the exact board you receive may differ slightly from the photo. This PCB is intended for hard drive repair and data recovery work. Before purchasing, confirm that a replacement board will resolve your issue by following our hard drive Diagnostics Guide, and verify compatibility using the Donor Matching Guide. Most Seagate PCBs store unique calibration and configuration in a ROM memory chip; that ROM data is required for the drive to operate correctly. The ROM chip or its contents must be transferred to the replacement board — if the chip can be moved, a local computer repair technician can usually perform the transfer. For customers spending $60 or more, we include a complimentary adaptation service that either transplants the ROM chip onto the new PCB or reprograms the replacement board with the correct ROM data. If you plan to do the swap yourself, review our PCB Replacement Guide first. Should a straightforward board swap not fix the problem, we also provide a specialized PCB Replacement Service to address more complex cases — see the Adaptation Service page for details.