Specifications

NOTE: One side of the USB cable lays across the hard drive. It is disconnected during the hard drive
removal process.
1.
Lift the inside edge of the USB board (1) to release it from the clips built into the base enclosure.
2.
Remove the USB board (2) and cable.
Reverse this procedure to install the USB board.
WLAN module
Description Spare part number
Qualcomm Atheros AR9485 802.11 b/g/n 1×1 WiFi Adapter 675794-005
Ralink RT3290LE 802.11 b/g/n 1x1 WiFi and Bluetooth 4.0 Combo Adapter 690020-005
Ralink RT5390R 802.11 b/g/n 1×1 WiFi Adapter 691415-005
IMPORTANT: Make special note of each screw and screw lock size and location during removal
and replacement.
CAUTION: To prevent an unresponsive system, replace the wireless module only with a wireless
module authorized for use in the computer by the governmental agency that regulates wireless devices
in your country or region. If you replace the module and then receive a warning message, remove
the module to restore device functionality, and then contact technical support.
Before removing the WLAN module, follow these steps:
1. Shut down the computer.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
42 Chapter 4 Removal and replacement procedures