HP EliteDesk 800 35W G3 Hardware Reference Guide - Page 38

Installing an external antenna

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Installing an external antenna Internal WLAN antennae are standard. If the computer is to be installed in a metal kiosk or other enclosure, you may wish or need to use an external WLAN antenna. 1. Remove/disengage any security devices that prohibit opening the computer. 2. Remove all removable media, such as a USB flash drive, 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 AC outlet and disconnect any external devices. CAUTION: 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 to avoid damage to the internal components of the computer. 5. Remove the computer access panel. For instructions, see Removing the computer access panel on page 12. WARNING! To reduce risk of personal injury from hot surfaces, allow the internal system components to cool before you touch them. 6. Rotate the hard drive latch up and out (1) to disengage the hard drive. 7. Slide the drive back until it stops, and then lift the drive up and out of the cage (2). 8. If your model is an EliteDesk 800 65W, remove the secondary fan under the hard drive. a. Disconnect the fan plug from the system board (1). b. Remove the three screws securing the secondary fan (2). 32 Chapter 3 Hardware upgrades

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Installing an external antenna
Internal WLAN antennae are standard. If the computer is to be installed in a metal kiosk or other enclosure,
you may wish or need to use an external WLAN antenna.
1.
Remove/disengage any security devices that prohibit opening the computer.
2.
Remove all removable media, such as a USB flash drive, 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 AC outlet and disconnect any external devices.
CAUTION:
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 to avoid damage to
the internal components of the computer.
5.
Remove the computer access panel.
For instructions, see
Removing the computer access panel
on page
12
.
WARNING!
To reduce risk of personal injury from hot surfaces, allow the internal system components
to cool before you touch them.
6.
Rotate the hard drive latch up and out (1) to disengage the hard drive.
7.
Slide the drive back until it stops, and then lift the drive up and out of the cage (2).
8.
If your model is an EliteDesk 800 65W, remove the secondary fan under the hard drive.
a.
Disconnect the fan plug from the system board (1).
b.
Remove the three screws securing the secondary fan (2).
32
Chapter 3
Hardware upgrades