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原帖由: Mortimer ,

标题:

Screen starts with low brightness and then turns off

文本:

The Monitor on my iMac starts on a really low brightness level. The content is barely readable.

When I try to increase the brightness the monitor turns off and wont work anymore.

The Mac stays on and can be used without problem with an external monitor. 

设备:

iMac Intel 27" EMC 2429

状态:

open