Apple 20Display manual Screen is dark or appears dim, Screen flickers

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mIf the power indicator light is yellow, check that your monitor cable is properly connected to the computer. If the cable is properly connected and the yellow light is on, you may need to install a video card in your computer or use an adapter connector. See “Do You Need a Video Card?” in Chapter 1.

The screen is dark or appears dim.

mMake sure that your computer and monitor are turned on.

mMake sure that the power cord and the monitor cable are securely connected at both ends.

mIncrease the brightness of the picture. See “Adjusting the Brightness of the Picture” in Chapter 3.

mThe Energy Saver option may be activated. Move the mouse or press any key on the keyboard to reactivate the monitor. In approximately 20 seconds (or until you no longer hear the beep), the monitor is reactivated.

mA screen saver that darkens your screen may be activated. Move the mouse or press any key on the keyboard to reactivate the monitor.

The screen flickers.

mMake sure the monitor cable is connected firmly to the correct port on the back of the computer.

If you have a video card installed in your computer, the monitor cable should be plugged into the port for the video card.

If you do not have a video card installed in your computer, the monitor cable should be plugged into the monitor port on the back of your computer.

mThe flickering could be caused by interference from a nearby power line, a fluorescent light, or electrical device—for example, a radio, a microwave oven, or another computer. Try relocating nearby electrical devices, or moving your computer and monitor.

mIf you have more than one monitor attached to your computer, the monitors might be interfering with one another. Move the monitors farther apart or set the monitors at an angle, so their screens are close and their back panels are farther apart. If after moving the monitors more than 16 inches apart you still see flickering, contact an Apple-authorized dealer or service provider.

36Chapter 4

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Contents Multiple Scan 20 Display Apple Computer, Inc Contents Adjusting the Picture Using the Display SoftwareTips and Troubleshooting Technical InformationDOC statement FCC statementRadio and television interference Vcci statementSetting Up Important safety instructionsWhat about electromagnetic emissions? Getting ready to set up Your Apple Multiple Scan 20 Display at a glance Choosing a good location for your monitor Lifting and positioning the monitorShoulders relaxed Using more than one monitor Do you need a video card?Connecting the monitor to your computer Connecting your keyboard to the monitor Tighten the thumbscrews on the connectionTurning the monitor on To turn on the monitor for the first timeInstalling the display software Disk’s icon appears on the desktopInstaller screen appears Click the Install buttonRead the Welcome screen and click OK Using the Display Software About the Control StripWorking with the Control Strip Choose Control Panels from the Apple K menu Changing screen resolutionWindow opens showing all the control panels Make the following choices in the control panelOther things you can do with the Monitors control panel What happens after you turn on the energy saving feature Conserving energyClose the control panel Using ColorSync Using Energy Saver with a screen saverColorSync control panel appears Click Set ProfileClick a monitor name to select it To show or hide the Control Strip, follow these steps Configuring the Control StripShowing and hiding the Control Strip Control Strip control panel appearsTo change the keyboard command, click Define hot key Box appearsPress the keys you want to use, then click OK Changing the font in Control Strip menus Adjusting the Picture Reset buttonAdjusting the contrast of the picture Making adjustments to the pictureAdjusting the brightness of the picture Use this control Follow this stepAdjusting the center of the picture Follow these stepsAdjusting the size of the picture Adjusting the rotation and color uniformity of the picture Adjusting the shape of the picture Adjusting the convergence of the picture Selecting the color temperature Adjust the color temperature of the pictureResetting controls to original levels Resetting brightness and contrastResetting individual picture controls Resetting all picture controlsUse these controls Follow this step Tips and Troubleshooting Care and cleaningTroubleshooting To clean the screen of the monitorProtecting your monitor from theft Make sure that the power cord is plugged in properly Monitor’s power indicator light doesn’t come onScreen is dark or appears dim Screen flickersNo colors appear on the screen Screen image is off centerScreen image is too large or too small After many hours of use, the screen image appears dim You can’t control the sound volume of a CDYou don’t see the monitor resolution you want Over time, you experience eyestrainAfter you change the screen resolution, icons move You see two resolution options labeled 640x870 75 Hz When you change resolutions, the monitor goes blankMonitor does not go to sleep Appendix a CompatibilityConnecting the monitor to your IBM PC-compatible computer Resolution Vertical refresh rate hertzThis adapter is shipped with your monitor Connect the PC adapter to the monitor cableTighten the thumbscrews on the monitor cable Using the monitor Appendix B Technical Information Voltage Adjusted at the factory for the following standard modesFrequency 47-63 Hz Power Maximum Approximately 66 pounds 30 kilogramsTilt To + 15˚ Swivel range ± 45˚ minimum Operating 10% to 80% Storage To 90% Shipping To 95%Pin miniature D-type connector Monitor cable specificationsPin Output signal Apple Computer, Inc