Hi, I see the image on this website shows a red arrow on the left corner of the board. Is this the PCB chip (WD PCB 006-0B40385) that needs to be swapped?
Please refer the attached photo about BIOS.
You can move the BIOS from your original PCB by using hot-air gun, then soldered it on the replacement board. Please refer: hard drive pcb firmware transfer Or you can find an electronics repair shop help you.
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Note: Send clear photos of your PCB (both sides) by attachments will make everything easier!