Appendices

Image Problems

Problem: No image appears on the screen

1.Verify the settings on your notebook or desktop PC.

2.Turn off all equipment and power up again in the correct order.

Problem: The image is blurred

1.Adjust the Focus on the projector.

2.Press the Auto button on the remote control or projector.

3.Ensure the projector-to-screen distance is within the 10-meter (33-feet) specified range.

4.Check that the projector lens is clean.

Problem: The image is wider at the top or bottom (trapezoid effect)

1.Position the projector so it is as perpendicular to the screen as possible.

2.Use the Keystone button on the remote control or projector to correct the problem.

Problem: The image is reversed or upside down

Check the Projection setting on the Utility menu of the OSD.

Problem: The image is streaked

1.Set the Frequency and Tracking settings on the Utility menu of the OSD to the default settings.

2.To ensure the problem is not caused by a connected PC’s video card, connect to another computer.

Problem: The image is flat with no contrast

Adjust the Contrast setting on the Main menu of the OSD.

Problem: The color of the projected image does not match the source image.

Adjust the Color Temperature and Gamma settings on the Main menu of the OSD.

Lamp Problems

Problem: There is no light from the projector

1.Check that the power cable is securely connected.

2.Ensure the power source is good by testing with another electrical device.

3.Restart the projector in the correct order and check that the Power LED is green.

4.If you have replaced the lamp recently, try resetting the lamp connections.

5.Replace the lamp module.

6.Put the old lamp back in the projector and have the projector serviced.

Problem: The lamp goes off

1.Power surges can cause the lamp to turn off. Press the power button twice to turn off the projector. When the Ready LED is on, press the power button.

2.Replace the lamp module.

3.Put the old lamp back in the projector and have the projector serviced.

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Optoma Technology EP771RFBA, TX771 manual Image Problems, Lamp Problems