5. If it is necessary to replace the hard drive connector adapter, slide the adapter (3) off of the front end of
the hard drive.
Reverse this procedure to reassemble and install the hard drive.
WLAN module
Description Spare part number
Broadcom BCM943142HM 802.11 bgn 1×1 Wi-Fi + Bluetooth 4.0 Combo Adapter 753076-005
Intel Dual Band Wireless-AC 3160 802.11 ac 1×1 WiFi + Bluetooth 4.0 Combo Adapter 710662-005 and
784638-005
Qualcomm Atheros AR9565 802.11b/g/n 1×1 WiFi + Bluetooth 4.0 Combo Adapter 733476-005
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. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
34 Chapter 5 Removal and replacement procedures
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