PowerBook G3, PowerBook G3 Series: No Contrast Control

The PowerBook G3 and G3 Series computers have a fixed-contrast liquid crystal display like the PowerBook 2400. You cannot change the contrast on these displays.

You can, however, make some adjustments to the display by using ColorSync:

1. Install the latest version of ColorSync.
This article can help you locate the software update mentioned here:
Article 14724: "Where To Find Apple Software Updates" - Lists online services for free Apple software updates.

2. Open the Monitors and Sound control panel and click the Color button. On the bottom of the window you will see a list of ColorSync Profiles and a Calibrate button.

3. Click the button to launch the Apple Monitor Calibration Assistant.

4. Walk through this series of adjustments until you get the screen the way you want it. Disregard the contrast setting instruction, but experiment with the other settings. The Target Gamma page will probably provide you with a contrast setting that will satisfy you.

5. Save the setting and you will return to the list of profiles.

6. Select the new one and you are done.

You can make multiple calibrations and create a choice of various settings for use in different applications or environmental settings.

Note: Macintosh PowerBook G3 Series computers should not be confused with Macintosh PowerBook G3 computers. Though the names are similar, there are significant differences. For more information differentiating between the computers, read article 24604: "PowerBook G3, G3 Series: Identifying Different Versions"