In this video, we show how to replace the wireless card, in a Vostro 16 5640. Ensure that you always use ESD protection when working inside the computer. Disconnect all the attached peripherals. To enter Service Mode, press and hold the B key, and then press the power button. The computer will boot up and the Owner Tag information is displayed on the screen. Press any key to proceed, the computer will emit three short beeps and shut down. To begin, loosen the two captive screws on the base cover.
Then, remove the remaining six screws. Using a plastic scribe, pry open the base cover, starting from the recesses near the hinges. Continue prying along the other sides to release the cover and remove it. To remove the wireless card, remove the screw that secures the wireless-card bracket to the system board. And lift the bracket off the wireless card. Disconnect the antenna cables from the connectors on the card. Then, slide and remove the card from its slot on the system board.
To install the wireless card, Connect the white antenna cable to the main connector marked with a white triangle. Likewise, connect the black antenna cable to the auxiliary connector marked with a black triangle. Align the notch on the wireless card to the tab on the slot and slide it in at an angle. Align and place the wireless card bracket, and replace the screw to secure it to the system board. Align the base cover with the palm-rest and keyboard assembly and snap it into place.
Replace the six screws and then tighten the two captive screws to secure the base cover. Finally, once the computer is fully assembled, connect the power adapter. And press the power button to turn on the computer and exit Service Mode. Please note, the computer will only power on if the power adapter is connected. For more information or support, visit: Dell.com/Support.
