Dell OptiPlex 5270 All-in-One Service Manual page 73

c) System board shield
d) Base cover
e) I/O bracket
3. To disconnect the speakers:
a) Disconnect the speaker cable from the system board [1].
b) Unroute the speaker cable from the routing guide on the display assembly base [2].
c) Remove the four screws (M3x4+7.1) that secure the speakers to the display-assembly base [1].
d) Lift the speakers and the speaker cable off the display assembly base [2].
Removing and Installing components 73