If you are replacing the Blu-ray drive, you must use the same daughterboard that came with your PlayStation 3. The daughterboard is paired to the motherboard, and the Blu-ray drive will not work with a different board. -------------- I understand however my daughterboard is not on the bottom of the blu-ray drive it must be on the inside. Is there any advice out there on how I go about doing this as I am not sure what I am doing???? If someone could post a link or any tips it would be greatly appreciated.