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iMac G5 (20-inch iSight) Troubleshooting — Symptom Charts 155
Display is tinted another color.
Reset the parameter RAM. Press the Command-Option-P-R keys. When you keep all the keys 1.
held down, you will hear the startup chime over and over again (about every ten seconds)
until you let go. After you hear the second chime, you can let go of the keys.
Does the computer display video after successfully resetting the computer’s PRAM?
Yes: Problem resolved. Restart the computer from the Apple menu and make sure the
computer display is no longer tinted another color.
No: Continue to the next step.
Connect an external monitor to the mini-VGA port. Does the external display exhibit the 2.
same color tinting?
Yes: Replace the logic board.
No: Check the TMDS cable connection. If connected and same color tinting persists, replace
the TMDS cable. Does color tinting persist after changing the TMDS cable?
Yes: Replace the LCD display panel.
No: Problem solved. Restart the computer from the Apple menu and make sure the
computer display is no longer tinted another color.