Keyboard & screen back lights pulsate
by arnthal - 5/23/13 11:13 AM
I have a MacBook Pro 15" early 2008 running !0.5.8.
Last night the keyboard illumination began pulsating bright-dim-bright-dim. At the same time the screen display began pulsating, too, sometimes alternating with the keyboard, sometimes in unison and sometimes unconnected, it seemed. Trying to control the keyboard light with F5 & F6 keys only showed me the usual semi-circular display blacked out with a little prohibition symbol underneath (circle with a diagonal line in its center). I tried the following remedies without any result.
ran Preferential Treatment for system preferences
Then I unchecked the automatic dimming control for both keyboard & screen. Now the keyboard continues to pulsate but at avery dim level. The F5 & F6 controls remain as before. The screen however does not pulsate. That is where I am at this point.
Has anyone had experience with this? I suspect I may have to reinstall the operating system as there are some other irregularities from time to tim,e.