Dell OptiPlex 755 - Manual (Page 116)

5. Gently spread the sides of the drive bracket and slide the hard drive into the bracket, aligning the drive with the bracket pins, until the drive clicks into
place.
6. Carefully slide the hard drive into the drive bay until it clicks into place.
7. Connect the power and data cables to the drive.
8. Ensure that the data cable is securely connected to the connector on the system board.
9. Check all connectors to be certain that they are properly cabled and firmly seated.
10. Replace the computer cover (see Replacing the Computer Cover ).
11. Insert bootable media and enter system setup (see System Setup ), and update the SATA port option under the Drives option list.
12. Exit system setup, and reboot the computer.
13. Partition and logically format your drive.
See the documentation for your operating system for instructions.
14. Test the hard drive by running the Dell Diagnostics (see Dell Diagnostics ).
15. If the drive you just installed is the primary drive, install your operating system on the hard drive. If the drive you just installed is the primary drive,
insert a bootable medium into your boot drive. See the documentation that came with the drive for instructions on installing any software required for
drive operation.
1 hard drive 2 hard drive bracket 3 pins
NOTICE: Always connect the data cable to the SATA0 connector on the system board, or to the SATA1 connector if you already have a hard drive
connected to the SATA0 connector and you are installing a second hard drive.