Hard Drive does not start up after replacing left Fan
I replaced the left fan on my MacBook Pro. While the top was open, I started everything up to make sure everything loaded correctly all the way to the login screen. It worked fine so I closed everything up and tightened all the screws. Then when I tried starting it up it got to the apple screen with an empty progress bar bellow it. I see the spinning progress wheel but nothing else happens. Please Help.
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Tried resetting the NVRAM. Reopened the computer and all connections are secure. The problem persists. I was able to get the laptop to boot off of an external hard drive (which already has a boot patrician) When I open disk utility, the "MacBook Pro" Volume (which is my internal hard drive) does not mount. Verifying the disk tells me that the disk needs to be repaired.
Is this a good question?