This item has been fully tested, verified working and guaranteed to be OK before shipment.
Please note that this item can fix drives with a circuit board problem ONLY.
Some drives have additional internal damages that can't be detected easily.
The ROM IC on the PCB board is programmed with the unique parameters/settings of it's original hard drive.
You need to swap the ROM IC (indicated by a red circle on the photo), then the donor board will be compatible with your hard drive.
I specialize in data recovery and stocking of different models & brands of hard drives spares for it. If you need a specific hard drive, or help, please let me know I might be able to help.