Q: Screen is half normal and half darker.
The first half hour my screen is half normal and half darker. What can be the problem?
It started after a replacement of the protection screen at the Apple-dealer in Marbella.
iMac, OS X Yosemite (10.10.2)
Posted on Feb 17, 2015 8:20 AM
Community Specialists
Hello benvanoeteren,
After reviewing your post, it sounds like the display is not working correctly. I would recommend that you read this article, it may be able to help the issue.
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
Brightness or color isn't uniform
If you have an older display, before evaluating the display for uniformity in lighting or color, the display may need to warm up. Older LCD (Liquid Crystal Displays) use CCFL (Cold Cathode Florescent) backlights. This kind of lighting may require several minutes to half an hour to warm up fully.
Thanks for using Apple Support Communities.
Have a nice day,
Mario
Posted on Feb 18, 2015 10:56 AM