Dell Latitude 7280 Owner's Manual page 17

a Disconnect the and fold back the smart card cable [1].
b Disconnect and fold back the LED board cable [2].
4 To release the speaker module:
a Disconnect the speaker cable from the connector on the system board [1].
b Un route the speaker cable by removing the tapes that secure the cable [2].
5 To remove the speaker module:
a Un route the speaker cable from the routing clips near the palm rest [1].
Removing and installing components 17