HP Pavilion dm4, Руководство по техническому обслуживанию и ремонту

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WWAN module
NOTE: The WWAN module and the WLAN module are not interchangeable.
Description Spare part number
HP un2420 Broadband Module (WWAN) 531993-001
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 45 ).
5. Remove the memory/wireless module compartment cover (see Memory module on page 47 ).
Remove the WWAN module:
1. Turn the computer upright with the front toward you.
2. Disconnect the two WWAN antenna cables (1) from the WWAN module.
3. Remove the two Phillips PM2.0×4.0 screws (2) that secure the WWAN module to the computer.
(The edge of the module opposite the slot rises away from the computer.)
Component replacement procedures 55