Removing And Replacing A Hard Drive - HP ProDesk 400 G4 SFF Hardware Reference Manual

Removing and replacing a hard drive

NOTE: Before you remove the old hard drive, be sure to back up the data from the old hard drive so that you
can transfer the data to the new hard drive.
1. Remove/disengage any security devices that prohibit opening the computer.
2. Remove all removable media, such as compact discs or USB flash drives, from the computer.
3. Turn off the computer properly through the operating system, then turn off any external devices.
4. Disconnect the power cord from the power outlet and disconnect any external devices.
CAUTION:
the system is plugged into an active AC outlet. You must disconnect the power cord to avoid damage to
the internal components of the computer.
5. Remove the computer access panel. See
6. Disconnect the power cable (1) and data cable (2) from the rear of the optical drive.
7. Press the release lever on the back of the drive (1), and then slide the drive through the front bezel (2).
26 Chapter 2 Hardware upgrades
Regardless of the power-on state, voltage is always present on the system board as long as
Removing the computer access panel on page 5.