How to replace the Wireless Module (WWAN) on a Precision 3490

This 3D experience gives you the step by step process of replacing the Wireless Module (WWAN) and a Precision 3490. The procedure will also include removing the Base Cover, WWAN (Wireless Module) and reinstalling them.

Removal

Base Cover

Identify the base cover highlighted in blue.

Loosen the captive screws that secure the base cover.

Pry the base cover near the hinges to release it from the system.

Lift the base cover off the palm rest assembly.

WWAN (Wireless Module)

Identify the wireless module (WWAN) highlighted in blue.

Lift the WWAN card shield off the WWAN card.

Remove the screw that secures the WWAN card bracket.

Remove the bracket that secures the WWAN antenna cables.

Disconnect the antenna cables from the WWAN.

Remove the WWAN card from the connector on the system board.

Install

WWAN (Wireless Module)

Identify the wireless module (WWAN) location highlighted in blue.

Insert the WWAN card into the connector on the system board.

Connect the black cable to the auxiliary (black triangle).

Connect the white cable to the main (white triangle).

Install the bracket to secure the antenna cables.

Install the screw to secure the WWAN card bracket.

Align and place the WWAN card shield over the 4G WWAN card.

Base Cover

Identify the base cover location highlighted in blue.

Align the base cover tabs to the slots, press the cover until it clicks into place.

Tighten the captive screws that secure the base cover to the system.