5.
Remove the mass storage device bracket (2). The mass storage device bracket and screws are
included in the Hard Drive Hardware Kit, spare part number 608373-001.
Reverse this procedure to reassemble and install the mass storage device.
WWAN module
Description Spare part number
HSPA EV-DO WWAN module 531993-001
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 WWAN 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.
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.
4. Remove the battery cover and battery (see
Battery on page 37).
5. Remove the hard drive (see
Mass storage device on page 40).
42 Chapter 4 Removal and replacement procedures ENWW
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