Seagate IDE 3.5 PCB ST3500830A 9BJ036-500 3.AAC 100406542 F

This sale includes the hard drive circuit board (PCB / logic board) ONLY — the hard drive itself is not included. Multiple PCBs are in stock, so the board you receive may look slightly different from the photo. Intended use: data recovery or repair of Seagate drives matching these identifiers (ST3500830A, 9BJ036-500, 3.AAC, 100406542 F). Before purchasing, confirm that a replacement board will resolve your issue by following our hard drive diagnostics guide and checking compatibility with the Donor Matching Guide. Important: many PCBs contain unique calibration and configuration data stored in a ROM "memory" chip; this information is required for correct drive operation. You must transfer the ROM chip or its contents to the replacement board. If you cannot perform the transfer yourself, a local computer technician can usually move the chip. For orders of $60 or more we provide a complimentary adaptation service that either moves the ROM chip to the new PCB or reprograms the replacement board with the correct ROM data. If you plan to do the swap on your own, review our PCB Replacement Guide first. If a simple board swap does not fix the problem, we also offer a dedicated PCB Replacement Service—see the Adaptation Service page for full details.