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Possible workaround for blank screen after sleep
Authored by: lokon1979 on Jun 22, '06 09:50:03PM
if this problem keep happen on your laptop, a great chance that just reset the power management unit can cure the problem once and for all (until next time it fail again)

according to apple support page:
"The Power Manager is an integrated circuit (computer chip) that is on the logic board of the MacBook or MacBook Pro... it is responsible for power management ... 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.

Over time, the settings in the Power Manager may become unusable, which can result in ... Examples include not turning on, not waking from sleep, not charging the battery, or not recognizing the AC Adapter, among others."

to reset PMU of MacBook and MacBook Pro:
http://docs.info.apple.com/article.html?artnum=303319

to reset PMU of iBook and PowerBook:
http://docs.info.apple.com/article.html?artnum=14449

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