July 2005
Intermediate to advanced
768 pages
13h 12m
English
Content preview from Apple Training Series: Desktop and Portable Systems, Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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General Information
Power Button Pads on Logic Board
With the top case removed, the power button is disconnected. Instead of having to reconnect the top case to turn on the system, there are two pads on the logic board that can be shorted across (with a tool like a metal fiathead screwdriver) to act as the power button.
These pads are located near the edge of the logic board, just above center of the hard drive. It is marked “POWER BUTTON.” The pads are separated with a vertical white line.
Resetting the PMU
You will recall from Lesson 3, “General Troubleshooting Theory,” resetting the Power Management Unit (PMU) is a quick fix. The PMU reset ...
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