Service Manual
Table Of Contents
- Latitude 7420 Service Manual
- Working on your computer
- Removing and installing components
- Recommended tools
- Screw List
- Major components of your system
- micro-SD card
- SIM card tray
- Base cover
- Solid-state drive
- WWAN card
- Battery
- Heatsink assembly
- Palmrest antenna module
- Display assembly
- Audio board
- Speakers
- SmartCard reader
- System board
- I/O board
- Power button with fingerprint reader
- Keyboard
- Palmrest assembly
- Software
- System setup
- Troubleshooting
- Getting help
Steps
1. Slide the smart card reader into its slot in the computer chassis and secure it using the four (M2x2.5) screws.
2. Adhere the smart card reader and NFC module cable and connect it to the USH board.
3. Adhere the touchpad FFC cable along the sides of the touchpad module and connect it to the system board.
Next steps
1. Install the speaker.
2. Install the battery.
3. Install the base cover.
4. Install the microSD card.
5. Follow the procedure in after working inside your computer.
System board
Removing the system board
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Enter the service mode.
3. Remove the microSD card.
4. Remove the SIM card.
5. Remove the base cover.
6. Remove the solid-state drive.
7. Remove the battery.
8. Remove the WWAN card.
Removing and installing components
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