Seagate SATA 3.5 PCB — ST3160023AS (9W2814-231, 100331799 J, 3.40)

Replacement printed circuit board for Seagate 3.5" SATA drives. Fits model ST3160023AS and carries board identifiers 9W2814-231 and 100331799 J. PCB revision/version: 3.40. Supplied as the bare Seagate SATA 3.5 PCB for drive repair, component swap or data recovery—confirm compatibility with your drive before installation.