Hardware Reference Guide - HP Engage One Retail System
5. Insert the SD card into the SD card slot on the system board.
6. Replace the computer head unit’s display panel. See Replacing the display panel on page 32.
7. Attach the computer head unit to the stand. See Attaching the Engage One head unit to the stand
on page 25
8. Reconnect the power cord and press the power button.
Removing and installing a WLAN module
1. Turn o the computer properly through the operating system, and turn o any external devices.
2. Disconnect the power cord from the computer.
IMPORTANT: Regardless of the power-on state, voltage is always present on the system board as long
as the system is plugged into an active AC outlet. You must disconnect the power cord and wait
approximately 30 seconds for the power to drain to avoid damage to the internal components of the
computer.
3. Remove the computer head unit from the stand. See Removing the Engage One head unit from the stand
on page 24.
4. Remove the display panel from the computer head unit. See Removing the display panel on page 31.
42 Chapter 3 Hardware congurations and upgrades