I have a Hitachi 500gb sata drive that spins up but I believe the controller board is bad.
I am including a photo of both sides .
Please let me know if you have the board I need.
hcs721050cla362 hitachi pcb 0a71256 is your donor PCB.
When you get this PCB, you need to move your original PCB’s BIOS to the replacement PCB. The 8pins (4 pins on each sides) with 25P05VP、25P10VP、25F512、25F1024、25F1024AN、SST25VF512、SST25VF010, etc. are the BIOS.
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Note: Send clear photos of your PCB (both sides) by attachments will make everything easier!