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Fix a misbehaving backlight on PowerBook G3 machines
Authored by: on Jul 10, '03 10:18:47AM

I noticed the above problem when installing OS X on a couple of Wallstreet machines. I simply set them not to go to sleep when the power is plugged in, and hopefully our users won't have to put them to sleep on battery (they're probably only going to be used as PowerPoint players).


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Fix a misbehaving backlight on PowerBook G3 machines
Authored by: acroyear on Jul 10, '03 02:19:15PM

I have seen this happen on a TiBook 400 MHz. Two things that I found would fix the problem in my case (I realize that with the Wall Streets we could be talking about two completely different issues): one, hook up an external VGA monitor and the backlight should come on (in my case I was worried that the video card had died altogether until I'd done this), or two, boot into single user mode, and the video/backlight should kick in, and it should remember to stay on the next time you reboot.


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Cause of Misbehaving Backlight
Authored by: DocMan on Jul 10, '03 07:08:07PM

The problem is with the Power Manager in Mac OS X. OS 9 doesn't have any problems with the Power Manager, but the X PM has a tendency to get corrupted. Symptoms of this corruption include the screen turning off and shortened battery life.

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