Removal and replacement procedures
Maintenance and Service Guide 4–11
WWAN module
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 (see “Battery” on page 4-6).
5. Remove the hard drive bay access cover (see “Hard drive” on page 4-9).
Remove the WWAN module:
Ä
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 computer functionality, and then contact technical support through
Help and Support.
1. Position the computer with the front toward you.
2. Disconnect the WWAN antenna cables 1 from the terminals on the WWAN module.
✎
The red WWAN antenna cable is connected to the WWAN module “Main” terminal. The blue WWAN
antenna cable is connected to the WWAN module “Aux” terminal.
3. Remove the two Phillips PM2.5x3.0 screws 2 that secure the WWAN module to the computer. (The WWAN
module tilts up.)
4. Remove the WWAN module 3 by pulling it away from the slot at an angle.
✎
WWAN modules are designed with a notch 4 to prevent incorrect insertion of the WWAN module into
the WWAN module slot.
Reverse this procedure to install the WWAN module.
Description Spare part number
WWAN module with Gobi technology 531993-001
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