'''You could damage your HD if you continue to crash (force start) the machine'''. Every time you catastrophically, instead of gracefully, shut down the drive you fragment the MBD.'' Do that too many times and it will not recover.''
You haven't mentioned the OS. You haven't told us if you've been inside the machine and didn't reassemble the sleep magnets correctly. Two pieces of information we need to offer successful solutions.
Follow the tags at right for some steps to check.
''If this answer is acceptable '''please remember to return and mark it'''.''