Optoma ES523ST Serivce Manual page 34

No Symptom
Remote
2 Controller/Control
Panel Failed
Function
3
Abnormal
4 Audio Abnormal
- Remote Controller
a. Check Battery
b. Check Remote Controller
c. Check IR Sensor Board
d. Check Main Board
- Control Panel
a. Check FPC
b. Check Keypad
c. Check Main Board
- Do "Reset (All data)" of the OSD Menu
- Check Main Board
- Check DMD Board
- Ensure that the signal cables and source are work as well
- Ensure that your Projector is not in "Mute" mode
- Check the interior Speakers of the projector
- Check the exterior Speaker that you are using
- Check Main Board
- Check Daughter Board
Procedure
ES523ST/EW533ST Confidential
3-5