Optoma EP739 Service Manual page 28

3-2.6 Remote Controller Troubleshooting
A. Remote Control No Function.
- Replace the battery if there is function.
- Use a known Remote control for the function test.
(Replace the Remote control if the new Remote control works fine
with the Unit.)
- Check the Main board if the Unit works fine with a known good
Remote control.
3-7
EP739/EP739H/EP738
Series