Replacement WD PCB 004-0B41785 is available on HDDZone.com. To swap Western Digital PCB with Board Number 004-0B41785, your should make sure the Board Number on your original pcb is 004-0B41785 too.
WD PCB 004-0B41785 Image:
WD PCB 004-0B41785
WD PCB 004-0B41785 Additional Images:
WD PCB 004-0B41785
WD PCB 004-0B41785 PCB 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.
HDDZone.com provides all kinds of hard drive PCB boards. Free shipping worldwide!
HDD PCB Online Shop: HDDZone.com
Useful Guide: Hard Drive PCB Replacement
Contact US: Please feel free to contact us by email sales@hddzone.com.
Note: Send clear photos of your PCB (both sides) by attachments will make everything easier!