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This WD hard drive circuit board is a direct replacement part for models marked 0B44198, 006-0B44198 and 001-0B44198. It is specially designed for Western Digital 3.5-inch desktop hard drives to solve failures caused by circuit damage, power issues or component burnout. Each PCB has passed strict electrical testing to ensure reliable performance and long service life. It is an essential repair component for both personal DIY maintenance and professional data recovery services. Please note that the original BIOS chip needs to be transferred from the faulty board for proper use.