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hello, I have a macbook pro with the logic board a1212 broken , I would like to know if i can replace it with a A1261 (to have such a powerful pc). thanks
No sorry they are not cross compatible , for starters the screens are different a1212 uses CFL bulb , while the a1261 uses LED bulb.
A white screen usually indicates a failed hard dive. Try disconnecting the drive from the logic board and booting from the original system installation optical disk.