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First return the machine to its original configuration.  Changing hard drive can bring on a whole new set of issues.  You have to be able to get to Disk Utilities to format the drive.

Since the old drive is already out use an external enclosure or adapter and hook it up to another Mac and do your repairs there.  Once you have a known good drive and system (that you have booted from on the other machine), you can install it and see if you have issues.  Do one upgrade at a time, solve any problems like run away fans first, then go for the upgrade.