Optoma EP719 Service Manual page 18

Step3: Unscrew four screws and unplug one wire to remove back shield.
There is still a screw in this side
2
1
3
4
NOTE: When you remove the back shield, you have to detach it from the top .(As
the picture show)
Step4: Unscrew four screw to remove speaker
from back shield.
EP719 / EP716 / EP719R / EP716R /
2-7
EP719P / EP716P