Replacement Hitachi PCB OA29470 is available on HDDZone.com. To swap Hitachi PCB with White Paper Number OA29470, your should make sure the White Paper Number on your original pcb is OA29470 too.
Hitachi PCB OA29470 Image:
Hitachi PCB OA29470
Hitachi PCB OA29470 Additional Images:
Hitachi PCB OA29470 Type 1
Hitachi PCB OA29470 Type 2
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!