Removal and replacement procedures
Maintenance and Service Guide 4–17
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 4-7).
5. Remove the accessory cover (see “Mass storage device” on page 4-9).
Remove the WWAN module:
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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 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.
Description Spare part number
UNDP HSPA EV-DO WWAN module (does not support Linux operating system; available in all
countries and regions, except China)
531993-001
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