Dell OptiPlex GX400 - Manual (Page 18)

b. If you are installing a SCSI device, ensure that the SCSI interface cable is properly connected to the interface connector on the SCSI controller board.
5. Connect a DC power cable to the power input connector on the back of the drive.
Attaching Hard-Drive Cables
6. Ensure that all cables are firmly connected. Fold cables out of the way to provide airflow for the fan and cooling vents.
7. Ensure that the control panel cable is firmly connected to the system board.
The control panel contains the hard-drive activity light. To locate the control panel system board connector, see " System Board Components ."
8. Replace the front panel.
9. Rotate the power supply back into position until the securing tab snaps into the release latch.
10. Replace the computer cover and restart the computer .
11. Enter system setup, and update the drive settings.
After you update the system settings, exit system setup and reboot the computer.
12. Partition and logically format the drive before proceeding to the next step.
See the operating system's documentation for instructions.
13. Run the Dell Diagnostics to test the drive.
14. If the hard drive you installed is the primary drive, install the operating system on the drive.
See the operating system's documentation for instructions.
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