Optoma EP756 User Manual - Page 25

English Appendices Problem : The screen of the Notebook or PowerBook computer is not displaying your presentation. 4 If you are using Notebook PC: Some Notebook PCs may deactivate their own computers' screen when a second display device is in use. Each of them has different way to be reactivated. Refer to your computer's documentation for detailed information. 4 If you are using an Apple PowerBook: In Control Panels, open the PowerBook Display to select Video Mirroring "On". Problem : Image is unstable or flickering 4 Use "Tracking" to correct it. 4 Change the monitor color setting from your computer. Problem : Image has vertical flickering bar 4 Use "Frequency" to make an adjustment. 4 Check and reconfigure the display mode of your graphic card to make it compatible with the product. Problem : Image is out of focus 4 Adjust the Focus Ring on the projector lens. 4 Make sure the projection screen is between the required distance 3.7ft.(1.1m)~ 40.7ft.(12.4m) from the projector. Problem : The screen is outstretched when displaying 16:9 DVD. The projector itself will automatically detect 16:9 DVD and adjust the aspect ratio by digitization to full screen with 4:3 default setting. If the projector is still outstretched, you will also need to adjust the aspect ratio by referring to the following: 4 Please select 4:3 aspect ratio type on your DVD player if you are playing a 16:9 DVD. 4 If you can not select 4:3 aspect ratio type on your DVD player, please select 4:3 On Screen-Display(OSD) function of the projector for your display. Problem : Image is reversed. 4 To open "Menu" then select "Management" to adjust the projection. Problem : Lamp burns out or makes a popping sound 4 When the lamp reaches its end of life, it will burn out and may make a loud popping sound. If this happens, the projector will not turn back on until the lamp module has been replaced. To replace the lamp, follow the procedures in the "Changing the Lamp". 23