Replacement Hitachi PCB 0A29481 is available on HDDZone.com. To swap Hitachi PCB with Main Controller IC Number 0A29481, your should make sure the Main Controller IC Number on your original pcb is 0A29481 too.
Hitachi PCB 0A29481 Image:
Hitachi PCB 0A29481
Hitachi PCB 0A29481 Additional Images:
Hitachi PCB 0A29481 Main Controller IC Number
For most of the PCB boards, we also need to swap the BIOS Chip from your original PCB to the replacement PCB, in order to make the PCB compatible with you hard drive.
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Note: Send clear photos of your PCB (both sides) by attachments will make everything easier!