If you have the original Blu-ray control board you can just change out all but the control board. If you don't have the control board that is married ...
If the ps3 is still on 3.55 put it in service mode and go through the last part of the downgrade. If it is not on 3.55 then flash the downgrade bin to...
Once you downgrade a ps3 it will format the hard drive if it is a slim or a nor chip in it. If it is a nand chip it will not format the hard drive. Yo...