Dell Latitude 7280 Owner's Manual page 40

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 base cover.
4. Disconnect the battery cable from the connector on the system board.
5. Remove the memory module.
6. Remove the PCIe SSD.
7. Remove the WLAN card.
8. Remove the WWAN card.
9. Remove the heat sink
10. To disconnect the eDP cable:
NOTE: If your system is shipped with an IR camera, then the IR cable must be disconnected. The IR cable is located
beneath the eDP cable connector.
a. Un route the WLAN and WWAN cables from the routing channels [1].
b. Remove the M2.0 x 3.0 screws that secure the eDP cable [2].
c. Remove the eDP cable bracket [3].
d. Disconnect the eDP cable from the system board [4].
e. Lift the tape that secures the eDP cable to the system board [5].
11. 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 cable from the connector. Do not pull the cable as it may result in breakage.
a. speaker cable [1]
b. LED board cable [2]
c. coin cell battery cable [3]
40 Disassembly and reassembly
assembly.