Exactly It Might Die Of If It Had Mechanical Failure Like Scratched Platters,Broken Pin,Improper Installation,and etc So use an external drive (must have no data) 3.5" inch and transfer all the data to it then install the 3.5" inch drive or get a new one to replace it in your system
WD Or Seagate
To Install new harddrives in a desktop,Use A Regular Screwdriver
In your Chassis you can find a HDD Rack Take Out The Mount and Screw your HDD in the mount,install the mount in the Rack