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Apple emac ati usb2 2005 Service Manual

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14 - 
 
eMac ATI Graphics/USB 2.0/2005 Troubleshooting
 General Information
 
How to Reset the PMU on the Logic Board
 
Resetting the PMU (Power Management Unit) on the logic board can resolve many system 
problems. 
 
Note:
 
 Whenever you have a unit that fails to power up, follow this procedure, starting 
with step 3, before replacing any modules. 
 
1.
Save open documents and quit all open applications. 
2.
Turn the computer off by choosing Shut Down from the Special menu (if using Mac OS 9), or choose 
Shut Down from the Apple menu if using OS X.
3.
Unplug all cables, except the power cord, from the computer.