Question about Apple PowerBook G4 Mac Notebook

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The screen suddenly went black while connected to an electrical outlet. Nothing works.

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Three immediate possibilities in order of expense:
1) Make sure the brightness is on. Press the F2 key.
2) Screen backlight could be blown out, especially if you can hear the disk seeking, fans, etc. even though the screen is black. Connect your Mac to an external display or TV using the appropriate adapters. If you get an image, you need a new backlight or LCD panel.
3) Entire machine is plotz, especially if you hear absolutely no chimes, disk movement, optical reset, fans, etc. This may indicate a power board or logic board issue.

Posted on Oct 28, 2009

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Posted on Jan 02, 2017

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Here's some tricks I would try...
1. Verify the monitor's power cord is plugged firmly into the wall outlet and the back of the monitor.
2. Verify the monitor cable is firmly connected to the computer and the monitor.
3. Verify that you have turned the monitor power switch on.
4. If the power light on the monitor is not on, test the wall outlet (plug in a light or something you know works).
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