Seagate ST500DM002 1BC142-300 JC4B 5701 AG SATA 3.5 PCB (Logic Board)

This listing is for the hard drive circuit board (PCB / logic board) only — no hard drive is included. Because we stock large quantities, the exact PCB you receive may differ slightly from the photo. Intended for use in data recovery or hard drive repair, this PCB matches the Seagate model identifiers shown (ST500DM002, 1BC142-300, JC4B, 5701 AG) and is a SATA 3.5 logic board. Important: many hard drive PCBs contain unique ROM firmware that is required for the drive to function. That ROM data (or the ROM chip itself) must be transferred to the replacement board for the drive to operate correctly. If the ROM chip can be physically moved, a local computer technician can usually perform the transfer. Before purchasing, confirm compatibility by consulting our Donor Matching Guide and use our hard drive diagnostics guide to determine whether a PCB swap will fix your issue. If you plan to perform the swap yourself, review the PCB Replacement Guide for step-by-step instructions. For customers spending $60 or more, we provide a complimentary adaptation service that includes either transplanting the ROM chip onto the new PCB or reprogramming the replacement board with the correct ROM data. If a simple PCB replacement does not resolve the problem, we also offer a dedicated PCB Replacement Service — see the Adaptation Service page for more information.