Firmware Upgrade Procedure - Optoma ES523ST Serivce Manual

5-1-3 Setup Procedure
1. Set up
- Plug in Power and RS232 cable in the PC, the ON/
STANDBY LED will display green.
- Hold the "Menu" then press "Power" button about 5
seconds then release these two buttons.
Note: - The system fan and the lamp will not operate.

5-1-4 Firmware Upgrade Procedure

1. Execute the "DLP Composer
2. Click "Edit" and "Perferences".
TM
Lite 9.2" file.
ES523ST/EW533ST Confidential
RS232 port
5-4