HP Compaq dc5000 SFF Hardware Reference Manual page 34

Hardware Upgrades
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10. Connect the opposite end of the data cable to the appropriate
system board connector 1.
Hard Drive Connector Locations
When replacing the hard drive, transfer the four screws from the old
drive to the new one. The screws take the place of drive rails. You will
need a Torx T-15 screwdriver to remove and re-install the guide
screws.
If you have installed a PATA hard drive that is not automatically
recognized by the computer, see
Installation Guidelines."
If you replaced the primary hard drive, insert the Restore Plus! CD
to restore the operating system, software drivers, and any software
applications that were preinstalled on the computer. Follow the
instructions in the guide included with the Restore Plus! CD. When
the restore process has completed, reinstall any personal files that you
backed up before replacing the hard drive.
www.hp.com
Appendix B, "PATA Hard Drive
Hardware Reference Guide