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Ask Max: G4 PowerBook won't start up.

Asked on 09/10/2007:

My old G4 PowerBook laptop has not been used for over a year, I plugged it in but it won't start, no sounds, no picture on screen, no lights. Will a dead battery cause this problem?


Most Mac laptops have two batteries. One is the big removable battery but there is a second, smaller battery inside. Both batteries are rechargeable and replaceable. If both are completely drained, then you will experience boot-up problems. The best fix is to reset the power management unit (PMU), turn it on, and let it charge for 24 hours, uninterrupted. Below is a link to the PMU reset procedures for most G4 PowerBooks.

PMU Reset procedures

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