Service Manual
Table Of Contents
- Latitude 5420 Service Manual
- Contents
- Working inside your computer
- Major components of your computer
- Removing and installing components
- Recommended tools
- Screw list
- Disassembly and reassembly
- Subscriber Identity Module (SIM) card
- Micro Secure Digital (SD) Card
- Base cover
- WLAN card
- WWAN card
- Solid-state drive
- Memory modules
- Battery
- Battery cable
- Assembly inner frame
- LED board
- Heat sink
- Speakers
- System board
- Power-button board
- Smart card reader
- Keyboard assembly
- Keyboard bracket
- Display assembly
- Display bezel
- Display panel
- Camera/microphone module
- eDP/display cable
- Sensor board
- Display hinges
- Display back cover
- Dummy SIM-card slot filler
- Palm-rest assembly
- Software
- BIOS setup
- Troubleshooting
- Getting help and contacting Dell
Steps
1. Connect the antenna cables to the wireless card.
The following table provides the antenna-cable color scheme:
Table 2. Antenna-cable color scheme
Connectors on the wireless card Antenna-cable color
Main (white triangle) White
Auxiliary (black triangle) Black
2. Place the WLAN-card bracket on the WLAN card.
3. Align the notch on the wireless card with the tab on the WLAN card slot.
NOTE:
When removing the WLAN card from the computer, if the adhesive pad which helps secure the WLAN card in
place is removed from the computer along with the WLAN card, adhere it back to the computer.
4. Slide the wireless card at an angle into the WLAN card slot.
5. Replace the screw (M2x2.5) to secure the WLAN-card bracket to the WLAN card.
Next steps
1. Install the base cover.
2. Install the microSD card.
3. Install the SIM card.
4. Follow the procedure in After working inside your computer.
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Removing and installing components