User`s guide

Troubleshooting Adjusting the Display after Replacing the CRT/Video Board*/
Recalibrate White Points
Caution: If the video cable is connected to a third-party video card
that uses proprietary color calibration drivers, you might need to
disable the drivers to use the AppleVision color calibration
functions.
1 After you’ve rewritten the file, as instructed in “Upload
Parameter Settings,” restart the system.
2 Open Monitors & Sound and select Color.
3 Select the default 9300 white point and click Recalibrate.
• If you later choose another white point such as 6500 or
D50, you must click Recalibrate for the changes to take
effect.
• If the display looks blurry after recalibrating, adjust
convergence as described in the previous section.
• If you hold down the option key and click Factory Settings,
it might be necessary to perform a minor convergence
adjustment using Monitors & Sound.
4 If the Recalibration fails, a warning message will appear.
Click OK and click Recalibrate again.
5 If the recalibration fails again, use the duplicated file to
upload the parameter settings. (Hold down the option key and
drag the Parameter Settings 1710 file out of the Parameter
File Backup folder; then follow the procedure under “Upload
Parameter Settings.”) Adjust the display. If the
recalibration fails again, click Recalibrate.
Note: These multiple recalibration attempts might seem
excessive, however lab tests have confirmed a high success
rate at saving the display and preventing needless
replacements.
6 If the recalibration fails again (after the fourth attempt),
call Apple Technical Support. (In the US, call 1-800-919-
2775, option 3.)