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Are there any dangers in resetting a PMU?
- Thread starter Lobos
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The only danger is that on some Macs the PMU can crash if you hit the button twice, and that can drain your battery or leave you with trouble similar to the problem you are trying to fix. The cure is to try a startup, and if it fails, reset (once this time) again.
I have a PowerBook just barely over a year old and the battery recently went from holding a good 2.5-3 hour charge to only 30 minutes (if I'm lucky.) Sometimes it will even turn off on me out of nowhere. Could resetting the PMU help out at all?
As long as you follow the PMU instructions for your model, it won't hurt to try, and might help. Get the documentation straight from Apple for the right procedure:
http://docs.info.apple.com/article.html?artnum=14449
You could also peek at the battery calibration routine, but half an hour is pretty severe, and calibration is mostly a cosmetic problem rather than a killer.
http://docs.info.apple.com/article.html?artnum=86284
http://docs.info.apple.com/article.html?artnum=14449
You could also peek at the battery calibration routine, but half an hour is pretty severe, and calibration is mostly a cosmetic problem rather than a killer.
http://docs.info.apple.com/article.html?artnum=86284