when unplugged, screen goes black

Question

Level 1

9 points

when unplugged, screen goes black

plugged in, the macbook has no problems, but as soon as i unplug it, even with a full battery after about 5 seconds, the screen goes black like the book is going to sleep. i have to hit a few keys (random) to wake it up and the screen eventually comes back up and it makes the sound like it's waking up. but again, after about 5 seconds, the screen goes black again.

iMac / macbook, Mac OS X (10.5.3)

Posted on May 9, 2009 11:14 AM

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Answer 1

JoeyR

Level 6

8,305 points

May 13, 2009 10:49 AM in response to strich

You may want to try resetting your System Management Controller (SMC):

+*The System Management Controller is an integrated circuit (computer chip) that is on the logic board of the computer. As the name implies, it is responsible for power management of the computer. It controls backlighting, hard disk spin down, sleep and wake, some charging aspects, trackpad control, and some input/output as it relates to the computer sleeping.*+

http://support.apple.com/kb/HT1411

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Answer 2

strich Author

Level 1

9 points

May 13, 2009 9:05 AM in response to strich

Does anyone have a suggestion? It's become very frustrating. I welcome any suggestions or ideas.

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Answer 3

Anton53

Level 2

230 points

May 13, 2009 1:54 PM in response to strich

Did you try turning sleep completely off in System Preferences to see what happens?

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