Seagate ST31000528AS SATA 3.5 PCB — 9SL154-568 CC35 4778 K

Replacement printed circuit board for Seagate SATA 3.5 drives. Matches model ST31000528AS and carries PCB part number 9SL154-568 with board code CC35 and marker 4778 K. Use this exact PCB when repairing or swapping the electronics on compatible Seagate 3.5 SATA hard drives—confirm your drive’s PCB identifiers before purchase.