It took about four days of 8 hour a day power up conditioning time for my freecycled Apple Multiple Scan 17 Display to recover to an acceptable color balance, and there were some mechanical intermittents along the way. There were some plugged connections deep inside that I reseated, and in addition some input blocking aluminum electrolytic capacitors to the video amp inputs appear to have gradually reformed their oxide. Obnoxious when I first got it, but performs solidly now! If you can, leave it on running for a while with any sleep mode disabled.