This tutorial provides step-by-step instructions for removing and installing the WLAN card on your Dell Pro 14 PC14250/PC14255.
Before you begin, turn off your computer and disconnect all attached peripherals.
Always wear an ESD wrist strap while working inside the computer to prevent damage due to electrostatic discharge.
In this video, we will demonstrate how to replace the WLAN card on your Dell Pro 14 PC14250 or PC14255. Ensure that you always use ESD protection when working inside the computer. Turn off your computer and disconnect all the attached peripherals.
To enter Service Mode, press and hold the “B” key on the keyboard, then press the power button. The system will boot and display the Owner Tag screen. Press any key to proceed, the computer will beep three times and shut down. To begin, loosen the nine captive screws that secure the base cover to the chassis. Next, use a plastic scribe to pry open the base cover. Start from the U-shaped indents near the hinges. Continue prying along the top and sides to release the base cover. And remove it. Remove the mylar sheet from the motherboard.
Now, let’s locate the WLAN card on the system board. Remove the screw that secures the wireless-card bracket, then lift the bracket from the WLAN card. Disconnect the antenna cables from the WLAN card. Slide the WLAN card out of its slot and remove it.
Now, let’s install the WLAN card. Align the notch on the WLAN card with the tab in the slot, then slide it in at an angle. Connect the white antenna cable to the connector labeled Main, and the black cable to the connector labeled Aux. Place the bracket onto the WLAN card and align its screw hole with the one on the system board. Replace the screw to secure the bracket to the system board. Place the mylar sheet on the motherboard. Align the base cover with the palm-rest assembly and snap it into place.
Tighten the nine captive screws to secure the base cover to the palm-rest assembly. Once the computer is fully assembled, connect the power adapter. Press the power button to turn on the computer. Note: The computer will only turn on if the power adapter is connected. For more information about Dell Pro 14 PC14250 or PC14255, visit: Dell.com/Support.
