- Notes, cautions, and warnings
- 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
- Speaker board
- Display assembly
- Speakers
- Tweeters
- Tweeters and palmrest antenna assembly
- Smart card reader
- Audio board
- System board
- I/O board
- Power button with fingerprint reader
- Keyboard
- Palmrest assembly
- Software
- BIOS setup
- Troubleshooting
- Handling swollen Lithium-ion batteries
- Dell SupportAssist Pre-boot System Performance Check diagnostics
- Built-in self-test (BIST)
- System-diagnostic lights
- Recovering the operating system
- Real-Time Clock (RTC Reset)
- Backup media and recovery options
- WiFi power cycle
- Drain residual flea power (perform hard reset)
- Getting help and contacting Dell
Latitude 7520 Service Manual
Removing the system board
Prerequisites
- Follow the procedure in before working inside your computer.
- Enter the service mode.
- Remove the microSD card.
- Remove the base cover.
- Remove the solid-state drive.
- Remove the
heatsink assembly.
CAUTION Remove the heatsink assembly before removing the system board as there are two (M2x3) screws underneath the heatsink that secures the system board to the computer.NOTE For configurations shipped with a carbon fiber palmrest and without WWAN antennas, the dummy SIM card tray must removed from the system before removing the system board.
To remove the dummy SIM card tray, push the release latch inwards and then slide dummy card tray out of the computer.
NOTE For non-WWAN configurations, remove the WWAN card shield and WWAN card bracket before removing the system board.
About this task
The following images indicate the location of the system board and provide a visual representation of the removal procedure.
Steps
- Remove the single (M2x2.5) screw from the finger print reader bracket and remove the bracket from the computer.
- Disconnect the fingerprint reader FPC from the system board.
- Remove the single (M2x2) screw and lift the bracket from the WLAN antenna cables.
- Disconnect the WLAN antenna cables from the WLAN module on the system board.
- Remove the single (M2x2) screw and lift the bracket from the WWAN card.
- Disconnect the WWAN antenna cable and release the cable from the rubber guides on the system board.
- Remove the two (M2x2) screws securing the display cable bracket to the system board.
- Lift to remove the display cable bracket from the computer.
- Disconnect the display, camera, touch screen, sensor board cables from the system board and unroute them from guiding tabs.
- Disconnect the speakers board FPC, tweeter cable, audio board FFC, touchpad FFC, USH board FFC and, LED board FFC from the system board.
- Remove the four (M2x2.5) screws (For computer configuration with fingerprint reader on power button) or five (M2x2.5) screws (For computer configuration without fingerprint reader), two M2x4 screws, and two M2x3 screws securing the system board in place.
- Carefully slide the system board out of the computer.
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