HP EliteDesk 705 G3 Hardware Reference Manual page 26

4. Disconnect the power cord from the AC outlet and disconnect any external devices.
IMPORTANT:
as 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.
6. Disconnect the power cable (1) and data cable (2) from the rear of the optical drive.
IMPORTANT:
damaging the cable.
7. Press upward on the green release latch on the underside of the drive (1), and then slide the drive out of
the drive bay (2).
20 Chapter 2 Hardware upgrades
Regardless of the power-on state, voltage is always present on the system board as long
When removing the cables, pull the tab or connector instead of the cable itself to avoid