== Can't find a boot ==
'''disk (System folder).''' ''If you put in a new HDD you need to format it and install a system on it.''
'''If that was done''' before the install then ''you've pooched the logic board, ribbon cable, or connector to the HDD.'' Only you know if you have fully connected the HD, only you can tell if damage to the connector, ribbon cable or logic board is more likely.
'''Remember to return and mark accepted the answer that best solves your problem.'''
Good luck,
N