Latitude 7490 Owner's Manual

Removing system board

1. Follow the procedure in Before working inside your computer.
   NOTE If your computer is shipped with a WWAN card, then the removal of a blank SIM card tray is a requirement.
2. Remove the SIM card.
3. Remove the dummy SIM card tray.
4. Remove the base cover.
5. Disconnect the battery cable from the connector on the system board.
6. Remove the memory module.
7. Remove the PCIe SSD.
8. Remove the WLAN card.
9. Remove the WWAN card.
10. Remove the heat sink assembly.

To identify the screws, seescrew list.

11. To remove the memory module bracket:
    1. Remove the two (M2.0 x 3.0) screws that secure memory module bracket to the system board [1].
    2. Lift the memory module bracket from the system board [2].
       
12. To disconnect the eDP cable:display assembly
13. To disconnect the cables:
    NOTE To disconnect the speaker, LED board, coin cell battery, and the power connector port cables, use a plastic scribe to release the cables from the connectors. Do not pull the cable as it may result in breakage.
    1. speaker cable [1]
    2. LED board cable [2]
    3. coin cell battery cable [3]
    4. touchpad cable and USH board cable [4]
    5. power connector port [5]
    
14. To remove the system board:
    1. Remove the USB type-C bracket.
       Image does not display the USB type-C bracket removal.
    2. Remove the three (M2.0 x 5.0) screws that secure the system board [1].
    3. Lift the system board away from the computer [2].
    
15. Remove the two (M2.0x5.0) screws that secure the USB Type-C bracket.
    
16. Flip the system board, peel off the tapes securing the bracket and remove the USB Type-C port from the system board.
    
    NOTE When removing or reinstalling the USB Type-C bracket to the system board, technicians must place the system board on an ESD mat to avoid damage.